FW: Nature Contents: 24 July 2003 Volume 424 No. 6947 pps 355-472

[Friam mailing list]

This is a multi-part message in MIME format.

------=_NextPart_000_0022_01C3511A.5941F440
Content-Type: text/plain;
        charset="US-ASCII"
Content-Transfer-Encoding: 7bit

NATURE TABLE OF CONTENTSSubject: Nature Contents: 24 July 2003 Volume 424
No. 6947 pps 355-472



           nature.com  about npg  nature science update  naturejobs
natureevents  help  site index



           SEARCH SITE


     Table of Contents



                  24 July 2003



           Editorials
            News
            News Feature
            Correspondence
            Books and Arts
            Concepts
            News and Views
            Brief Communications
            Articles
            Letters to Nature
            New on the Market
            Naturejobs

     This alert is supported by Okinawa Institute of Science and Technology
(OIST) Project
                  Invitation to the International Symposium "New Horizons in
Molecular Sciences and Systems: An Integrated Approach"
                  October 16-18, 2003 in Okinawa, Japan
                  This symposium will promote OIST which aims to make a new
paradigm of integrated approaches in science and technology.
                  Special Lecture: Jerome Friedman (MIT) Keynote Speakers:
Leroy Hood (Inst for Systems Biology), Richard Karp (UC Berkeley), Steve Chu
(Stanford U), Uri Sagman (C Sixty Inc)
                  For more information: www.okinawasympo2003.jp






             No Nature, no impact.

            Nature's 2002 ISI impact factor has reached an all-time high of
30.4. To celebrate, we are offering a 30% discount to Nature for one month
only.
            Click here to take up this special offer





              Feature of the week
            Synthetic sex cells
            Pioneering biologists are trying to grow eggs and sperm in the
lab. In doing so, they're entering a technical and ethical minefield. Click
here for this free feature.
            For science, read Nature.





              NatureEvents advertisement
            NEW - MSc SCIENCE ENTREPRENEURSHIP
            Are you a scientist with a desire to lead?

            You're already building your professional career and would like
to go further
            Would you like to develop skills in entrepreneurship, innovation
and new venture creation?
            Join a world class business school and learn from expert
academics and proven entrepreneurs. Part-time course begins in September
2003

            For more information email [hidden email], or visit
www.simfonec.co.uk
            Simfonec, 6th Floor, Cass Business School, 106 Bunhill Row,
London, EC1Y 8TZ
            Tel: [phone] Fax: [phone]






        Editorials

        A calm view of video violence 355
      Studies of violence in the media and its effects on people are clouded
by overheated rhetoric and exaggerated claims. More clarity is needed, both
in the science and in the way it is discussed.
      doi:10.1038/424355a
      Full Text

        The grand challenges facing physics 355
      It would be easy to delay the prioritization of major new projects at
US physics laboratories, but it needs to be done.
      doi:10.1038/424355b
      Full Text


        News

        Physics poised for sizeable gains in energy department's wish-list
357
      doi:10.1038/424357a
      Full Text

        US observation initiative calls for fresh view of Earth 357
      doi:10.1038/424357b
      Full Text

        UK experts map out route to licensing transgenic crops 358
      doi:10.1038/424358a
      Full Text

        Dispute over data privacy halts cancer study 359
      doi:10.1038/424359a
      Full Text

        African project seeks model solution to water shortage 359
      doi:10.1038/424359b
      Full Text

        Brain region linked to post-terror stress 360
      doi:10.1038/424360a
      Full Text

        Museum trustees quit after row over sale of artefacts 360
      doi:10.1038/424360b
      Full Text

        HIV drug resistance triggers strategic switch 361
      doi:10.1038/424361a
      Full Text

        US budgets for physical endeavour 361
      doi:10.1038/424361b
      Full Text

        news in brief 362
      doi:10.1038/424362a
      Full Text


        News Feature

        Developmental biology: Synthetic sex cells 364
      Some pioneering biologists are trying to grow eggs and sperm in the
lab. In doing so, they're entering a technical and ethical minefield. Carina
Dennis reports.
      doi:10.1038/424364a
      Full Text

      Click here for special germ cell web focus


        Video violence: Playing with fire? 367
      The latest computer games involve pretty gruesome scenes - severed
limbs and drive-by shootings are standard fare. But opinion is divided on
whether such games spark real-life violence. Tony Reichhardt investigates.
      doi:10.1038/424367a
      Full Text


        Correspondence

        Military-funded research is not unethical 369
      The key is to ensure that it is the military rather than the
scientists who are regulated.
      doi:10.1038/424369a
      Full Text

        Military: brain machine could benefit millions 369
      doi:10.1038/424369b
      Full Text

        Authorities should note sponsorship-results link 369
      doi:10.1038/424369c
      Full Text


        Books and Arts

        Uncertainty rules 371
      P. READ MONTAGUE reviews Decisions, Uncertainty, and the Brain: The
Science of Neuroeconomics by Paul W. Glimcher
      Neuroeconomics seeks to move brain studies beyond the fixed reflex.
      doi:10.1038/424371a
      Full Text

        Beauty and the bees 372
      THOMAS D. SEELEY reviews Form and Function in the Honey Bee by Lesley
Goodman
      doi:10.1038/424372a
      Full Text

        Universal support 373
      SEAN CARROLL reviews Echo of the Big Bang by Michael Lemonick
      doi:10.1038/424373a
      Full Text

        Vesalius's vessels 373
      MARY PURTON
      doi:10.1038/424373b
      Full Text


        Concepts

        Race: A genetic melting-pot 374
      MARCUS W. FELDMAN, RICHARD C. LEWONTIN & MARY-CLAIRE KING
      Ancestral genetic data are far more useful for medical purposes than
are racial categories, which may be correlated with disease for social or
economic rather than biological reasons.
      doi:10.1038/424374a
      Full Text


        News and Views

        Developmental biology: A tale of tails 375
      CHRISTOF NIEHRS
      Developing organisms still hold many surprises for biologists. For
instance, an entirely new 'organizer' - a clump of cells that tells other
cells what to do - has been discovered at a very early stage of zebrafish
development.
      doi:10.1038/424375a
      Full Text

        Particle physics: Strange days 376
      FRANK CLOSE
      Three new subatomic particles have been found, and all survive for an
unusually long time before they decay. Physicists now face the challenge of
explaining this within the framework of the existing theory.
      doi:10.1038/424376a
      Full Text

        Neurobiology: Caught in the act 377
      YADIN DUDAI
      Researchers may have seen the signature of a memory in the making. In
monkeys that learnt to associate two stimuli, single neurons changed their
responses before, during or after learning became evident.
      doi:10.1038/424377a
      Full Text

        Materials science: On the straight and narrow 378
      RICHARD A. REGISTER
      Nanoscale chemical patterns written on a substrate can direct the
self-assembly of polymer overlayers with remarkable precision. These polymer
films, in turn, can be used as templates for nanofabrication.
      doi:10.1038/424378a
      Full Text

        Developmental biology: Boundary lines 379
      SETH S. BLAIR
      Embryonic development is a complicated business, as a recent meeting
bore witness. The signals generated at the boundaries between compartments
were a key topic of discussion.
      doi:10.1038/424379a
      Full Text

        Neurobiology: A new way to network 381
      PATRICK MEHLEN
      Guidance molecules called semaphorins ensure that nerve cells grow in
the correct direction during development. It now appears that one semaphorin
interacts with integrin proteins to produce another effect.
      doi:10.1038/424381a
      Full Text

        100 and 50 years ago 381
      doi:10.1038/424381b
      Full Text

        Astronomy: An early stellar nursery 382
      PHILIP SOLOMON
      Searching for distant objects in our Universe is equivalent to looking
back in time, to the early origins of stars and galaxies. The most distant
object known shows the earliest evidence of star formation.
      doi:10.1038/424382a
      Full Text

        Obituary: Ira Herskowitz (1946-2003) 384
      ALEXANDER JOHNSON AND MARK PTASHNE
      doi:10.1038/424384a
      Full Text

        news and views in brief 385
      doi:10.1038/424385a
      Full Text


        Brief Communications

        Insect behaviour: Reversal of sex roles in nuptial feeding 387
      GORAN ARNQVIST, THERESA M. JONES & MARK A. ELGAR
      Female Zeus bugs subvert the traditional notion that amorous gifts are
a male preserve.
      doi:10.1038/424387a
      First paragraph | Full Text

        Psychophysics: Bees trade off foraging speed for accuracy 388
      LARS CHITTKA, ADRIAN G. DYER, FIOLA BOCK & ANNA DORNHAUS
      doi:10.1038/424388a
      First paragraph | Full Text

        Endocrinology: Bone adaptation requires oestrogen receptor-a 389
      KARLA LEE, HELEN JESSOP, ROSEMARY SUSWILLO, GUL ZAMAN & LANCE LANYON
      doi:10.1038/424389a
      First paragraph | Full Text

        Metallurgy (communication arising): Stainless-steel corrosion and
MnS inclusions 389
      Q. MENG, G. S. FRANKEL, H. O. COLIJN & S. H. GOSS
      doi:10.1038/424389b
      First paragraph | Full Text

        Metallurgy (communication arising): Stainless-steel corrosion and
MnS inclusions 390
      MARY P. RYAN, DAVID E. WILLIAMS, RICHARD J. CHATER, BERNIE M. HUTTON &
DAVID S. MCPHAIL
      doi:10.1038/424390a
      Full Text


        Articles

        Class 3 semaphorins control vascular morphogenesis by inhibiting
integrin function 391
      GUIDO SERINI, DONATELLA VALDEMBRI, SARA ZANIVAN, GIULIA MORTERRA,
CONSTANZE BURKHARDT, FRANCESCA CACCAVARI, LUCA ZAMMATARO, LUCA PRIMO, LUCA
TAMAGNONE, MALCOLM LOGAN, MARC TESSIER-LAVIGNE, MASAHIKO TANIGUCHI, ANDREAS
W. PUSCHEL & FEDERICO BUSSOLINO
      doi:10.1038/nature01784
      Summary | Full Text

        Semaphorin 7A promotes axon outgrowth through integrins and MAPKs
398
      R. JEROEN PASTERKAMP, JACQUES J. PESCHON, MELANIE K. SPRIGGS & ALEX L.
KOLODKIN
      doi:10.1038/nature01790
      Summary | Full Text


        Letters to Nature

        Molecular gas in the host galaxy of a quasar at redshift z = 6.42
406
      FABIAN WALTER, FRANK BERTOLDI, CHRIS CARILLI, PIERRE COX, K. Y. LO,
ROBERTO NERI, XIAOHUI FAN, ALAIN OMONT, MICHAEL A. STRAUSS & KARL M. MENTEN
      doi:10.1038/nature01821
      First paragraph | Full Text

        Rotational actuators based on carbon nanotubes 408
      A. M. FENNIMORE, T. D. YUZVINSKY, WEI-QIANG HAN, M. S. FUHRER, J.
CUMINGS & A. ZETTL
      doi:10.1038/nature01823
      First paragraph | Full Text

        Epitaxial self-assembly of block copolymers on lithographically
defined nanopatterned substrates 411
      SANG OUK KIM, HARUN H. SOLAK, MARK P. STOYKOVICH, NICOLA J. FERRIER,
JUAN J. DE PABLO & PAUL F. NEALEY
      doi:10.1038/nature01775
      First paragraph | Full Text

        Carbon solubility in olivine and the mode of carbon storage in the
Earth's mantle 414
      HANS KEPPLER, MICHAEL WIEDENBECK & SVYATOSLAV S. SHCHEKA
      doi:10.1038/nature01828
      First paragraph | Full Text

        Reflection signature of seismic and aseismic slip on the northern
Cascadia subduction interface 416
      MLADEN R. NEDIMOVI, ROY D. HYNDMAN, KUMAR RAMACHANDRAN & GEORGE D.
SPENCE
      doi:10.1038/nature01840
      First paragraph | Full Text

        Catastrophic extinctions follow deforestation in Singapore 420
      BARRY W. BROOK, NAVJOT S. SODHI & PETER K. L. NG
      doi:10.1038/nature01795
      First paragraph | Full Text

        Productivity-biodiversity relationships depend on the history of
community assembly 423
      TADASHI FUKAMI AND PETER J. MORIN
      doi:10.1038/nature01785
      First paragraph | Full Text

        The role of neuronal identity in synaptic competition 426
      NARAYANAN KASTHURI AND JEFF W. LICHTMAN
      doi:10.1038/nature01836
      First paragraph | Full Text

        Genetic evidence that relative synaptic efficacy biases the outcome
of synaptic competition 430
      MARIO BUFFELLI, ROBERT W. BURGESS, GUOPING FENG, CORRINNE G. LOBE,
JEFF W. LICHTMAN & JOSHUA R. SANES
      doi:10.1038/nature01844
      First paragraph | Full Text

        Anandamide and arachidonic acid use epoxyeicosatrienoic acids to
activate TRPV4 channels 434
      HIROYUKI WATANABE, JORIS VRIENS, JEAN PRENEN, GUY DROOGMANS, THOMAS
VOETS & BERND NILIUS
      doi:10.1038/nature01807
      First paragraph | Full Text

        The expression domain of PHANTASTICA determines leaflet placement in
compound leaves 438
      MINSUNG KIM, SHEILA MCCORMICK, MARJA TIMMERMANS & NEELIMA SINHA
      doi:10.1038/nature01820
      First paragraph | Full Text

        GATA4 mutations cause human congenital heart defects and reveal an
interaction with TBX5 443
      VIDU GARG, IRFAN S. KATHIRIYA, ROBERT BARNES, MARIE K. SCHLUTERMAN,
ISABELLE N. KING, CHERYL A. BUTLER, CARYN R. ROTHROCK, REENU S. EAPEN,
KAYOKO HIRAYAMA-YAMADA, KUNITAKA JOO, RUMIKO MATSUOKA, JONATHAN C. COHEN &
DEEPAK SRIVASTAVA
      doi:10.1038/nature01827
      First paragraph | Full Text

        The molecular nature of the zebrafish tail organizer 448
      ANTOINE AGATHON, CHRISTINE THISSE & BERNARD THISSE
      doi:10.1038/nature01822
      First paragraph | Full Text

        WAVE2 is required for directed cell migration and cardiovascular
development 452
      DAISUKE YAMAZAKI, SHIRO SUETSUGU, HIROAKI MIKI, YUKI KATAOKA,
SHIN-ICHI NISHIKAWA, TAKASHI FUJIWARA, NOBUAKI YOSHIDA & TADAOMI TAKENAWA
      doi:10.1038/nature01770
      First paragraph | Full Text

        Epidermal growth factor receptor is a cellular receptor for human
cytomegalovirus 456
      XIN WANG, SHU-MEI HUONG, MARIE L. CHIU, NANCY RAAB-TRAUB & ENG-SHANG
HUANG
      doi:10.1038/nature01818
      First paragraph | Full Text

        RhoG activates Rac1 by direct interaction with the Dock180-binding
protein Elmo 461
      HIRONORI KATOH AND MANABU NEGISHI
      doi:10.1038/nature01817
      First paragraph | Full Text

        Crystal structure of human cytochrome P450 2C9 with bound warfarin
464
      PAMELA A. WILLIAMS, JOSE COSME, ALISON WARD, HAYLEY C. ANGOVE, DIJANA
MATAK VINKOVI & HARREN JHOTI
      doi:10.1038/nature01862
      First paragraph | Full Text


        New on the Market

        Gene expression, amplification 469
      PCR, thermocyclers and some more software that works with Mac OS X.
      doi:10.1038/424469a
      Full Text


        Naturejobs

        A team effort 471
      PAUL SMAGLIK
      doi:10.1038/nj6947-471a
      Full Text

        Movers
      doi:10.1038/nj6947-472a
      Full Text


        Find out more about the The Guardian/Naturejobs recruitment
collaboration in the UK.
      www.nature.com/naturejobs/promotion/guard.html

        For the latest career issues and hot jobs visit www.naturejobs.com.
The free online careers resource for scientists.

        natureevents

        Events are vital for the contemporary scientist. From delegates
discussing hot issues and opinion, through to networking at conferences,
meetings provide a platform for learning and advancement.
      So with a burgeoning number of conferences across the globe, where can
scientists go to gain a complete resource?

      natureevents is a fully searchable, multi-disciplinary database
designed to maximise exposure for PCOs and academics alike. All the
information you need for scheduling event attendance for the year ahead.

      www.natureevents.com


        Nature Science Update

        This week's Nature Science Update www.nature.com/nsu includes:
      OLD TREES POOR CARBON SPONGE?
      Carbon stockpiles question idea that forests will counteract global
warming.


      DIRECT EVIDENCE FOUND FOR DARK ENERGY
      Mysterious force of cosmic acceleration marked Big Bang's afterglow.


      SARS DATABASE RAMPS UP
      Coronavirus website collates viral vitals.


      For more news like this visit Nature Science Update, the NPG's free
      popular science daily webzine, every day: www.nature.com/nsu



                    Stuck in a rut? Free access articles from Naturejobs:
SPOTLIGHTS & REGIONS (tours of scientific hubs)
www.nature.com/naturejobs/spotlight/
                  SPECIAL REPORTS (examinations of jobs issues on both sides
of the bench) www.nature.com/naturejobs/specialreport/








        Please note that you need to be a subscriber or site-licence holder
to enjoy full-textaccess to Nature. To purchase a subscription, please visit
www.nature.com/nature/subscribe/

      You have been sent this Table of Contents Alert because you have
chosen to receive it. You can change your e-mail alert preferences at any
time, by modifying your preferences on your current account at:
      www.nature.com/registration/Modify_registration.taf
      (You will need to log in to be recognised as a Nature registrant)

      To discontinue all email services from the Nature Publishing Group
click on the link below:
      www.nature.com/mar/sup/index.taf?e=[hidden email]

      For further technical assistance, please contact:
      mailto:[hidden email]

      For print subscription enquiries, please contact:
      mailto:[hidden email]

      For other enquiries, please contact:
      mailto:[hidden email]

      Nature Publishing Group's worldwide offices:
      London - Paris - Munich - New Delhi - Tokyo - Melbourne
      San Diego - San Francisco - Washington - New York - Boston




        C 2003 Nature Publishing Group




------=_NextPart_000_0022_01C3511A.5941F440
Content-Type: text/html;
        charset="US-ASCII"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>NATURE TABLE OF CONTENTS</TITLE>
<META content=3DNOARCHIVE name=3DROBOTS>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Dus-ascii"><LINK=20
href=3D"http://www.nature.com/nature/style.css" type=3Dtext/css =
rel=3Dstylesheet>
<META content=3D"MSHTML 6.00.2800.1170" name=3DGENERATOR></HEAD>
<BODY text=3D#000000 vLink=3D#0000ff aLink=3D#cc3300 link=3D#0000ff =
bgColor=3D#ffffff=20
leftMargin=3D0 topMargin=3D0 marginheight=3D"0" marginwidth=3D"0">
<DIV><FONT face=3DTahoma size=3D2><B>Subject:</B> Nature Contents: 24 =
July 2003=20
Volume 424 No. 6947 pps 355-472<BR><BR></FONT></DIV>
<DIV align=3Dcenter><A name=3Dtop></A><!-- Global nav starts here -->
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" bgColor=3D#cc3300 =
border=3D0>
  <TBODY>
  <TR>
    <TD bgColor=3D#ff9999 height=3D1><IMG height=3D1=20
      src=3D"/includes/globnavimages/spacer.gif" width=3D1></TD>
    <TD bgColor=3D#990000 rowSpan=3D3 width?1?><IMG height=3D1=20
      src=3D"/includes/globnavimages/spacer.gif" width=3D1></TD></TR>
  <TR>
    <TD align=3Dmiddle height=3D22>
      <TABLE height=3D22 cellSpacing=3D0 cellPadding=3D0 width=3D674 =
border=3D0>
        <TBODY>
        <TR>
          <TD width=3D2 height=3D22><IMG height=3D22=20
            =
src=3D"http://mailart.nature.com/naturetoc/includes/globnavimages/globalv=
ertic.gif"=20
            width=3D2 NOSEND=3D"1"></TD>
          <TD align=3Dmiddle width=3D92><A class=3Dwhite =
title=3Dnature.com=20
            =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cx0Av">nature=
.com</A></TD>
          <TD width=3D2 height=3D22><IMG height=3D22=20
            =
src=3D"http://mailart.nature.com/naturetoc/includes/globnavimages/globalv=
ertic.gif"=20
            width=3D2 NOSEND=3D"1"></TD>
          <TD align=3Dmiddle width=3D82><A class=3Dwhite=20
            title=3D"nature publishing group"=20
            =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Jf0Ak">about =

            npg</A></TD>
          <TD width=3D2 height=3D22><IMG height=3D22=20
            =
src=3D"http://mailart.nature.com/naturetoc/includes/globnavimages/globalv=
ertic.gif"=20
            width=3D2 NOSEND=3D"1"></TD>
          <TD align=3Dmiddle width=3D161><A class=3Dwhite=20
            title=3D"nature science update"=20
            =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0gv0AV">nature=
=20
            science update</A></TD>
          <TD width=3D2 height=3D22><IMG height=3D22=20
            =
src=3D"http://mailart.nature.com/naturetoc/includes/globnavimages/globalv=
ertic.gif"=20
            width=3D2 NOSEND=3D"1"></TD>
          <TD align=3Dmiddle width=3D89><A class=3Dwhite =
title=3Dnaturejobs=20
            =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0RU0Ab">nature=
jobs</A></TD>
          <TD width=3D2 height=3D22><IMG height=3D22=20
            =
src=3D"http://mailart.nature.com/naturetoc/includes/globnavimages/globalv=
ertic.gif"=20
            width=3D2 NOSEND=3D"1"></TD>
          <TD align=3Dmiddle width=3D102><A class=3Dwhite =
title=3Dnatureevents=20
            =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0BkU0A7">natur=
eevents</A></TD>
          <TD width=3D2 height=3D22><IMG height=3D22=20
            =
src=3D"http://mailart.nature.com/naturetoc/includes/globnavimages/globalv=
ertic.gif"=20
            width=3D2 NOSEND=3D"1"></TD>
          <TD align=3Dmiddle width=3D42><A class=3Dwhite title=3Dhelp=20
            =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0J10Ar">help</=
A></TD>
          <TD width=3D2 height=3D22><IMG height=3D22=20
            =
src=3D"http://mailart.nature.com/naturetoc/includes/globnavimages/g!lobal=
vertic.gif"=20
            width=3D2 NOSEND=3D"1"></TD>
          <TD align=3Dmiddle width=3D90><A class=3Dwhite title=3D"site =
index"=20
            =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0B7p0Ah">site =

            index</A></TD>
          <TD width=3D2 height=3D22><IMG height=3D22=20
            =
src=3D"http://mailart.nature.com/naturetoc/includes/globnavimages/globalv=
ertic.gif"=20
            width=3D2 NOSEND=3D"1"></TD></TR></TBODY></TABLE></TD></TR>
  <TR>
    <TD bgColor=3D#990000 height=3D1><IMG height=3D1=20
      src=3D"/includes/globnavimages/spacer.gif"=20
width=3D1></TD></TR></TBODY></TABLE><TR><TD height=3D"1"><IMG height=3D1 =

src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
NOSEND=3D"1"></TD></TR> <!--GLOBALNAV END--><!--LOGO - SPONSOR START-->
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D219 height=3D70><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D3 =
NOSEND=3D"1"><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Jx0A3"><IMG=20
      height=3D48=20
      alt=3D"Nature Publishing Group, publisher of Nature, and other =
science journals and reference works"=20
      src=3D"http://mailart.nature.com/naturetoc/npg_logo.gif" =
width=3D216 border=3D0=20
      NOSEND=3D"1"></A></TD>
    <TD align=3Dright width=3D381><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Jh0Am"><IMG=20
      src=3D"http://mailart.nature.com/naturetoc/logo_nature.gif" =
border=3D0=20
      NOSEND=3D"1"></A><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D10=20
    NOSEND=3D"1"></TD></TR></TBODY></TABLE><!--LOGO - SPONSOR =
END--><!--SEARCH BAR START-->
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D417 bgColor=3D#cccccc>
      <TABLE height=3D26 cellSpacing=3D0 cellPadding=3D0 =
bgColor=3D#cc3300 border=3D0>
        <FORM name=3Dform1=20
        =
action=3Dhttp://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0LT0AU=20
        method=3Dpost>
        <TBODY>
        <TR>
          <TD width=3D10><IMG height=3D1=20
            src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
            NOSEND=3D"1"></TD>
          <TD align=3Dright><FONT =
face=3DVerdana,Arial,Helvetica,Sans-serif=20
            color=3D#ffffff size=3D2><B>SEARCH SITE</B></FONT></TD>
          <TD width=3D10>&nbsp;</TD>
          <TD><INPUT maxLength=3D200 size=3D15 name=3Dsearch_fulltext> =
</TD>
          <TD width=3D10>&nbsp;</TD>
          <TD width=3D25><INPUT type=3Dimage height=3D19 alt=3Dsearch =
width=3D25=20
            src=3D"http://mailart.nature.com/naturetoc/button_go.gif" =
border=3D0=20
            name=3Dimage></TD>
          <TD width=3D5 wifth=3D"10"><IMG height=3D1=20
            src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D5=20
            NOSEND=3D"1"></TD>
          <TD width=3D5 bgColor=3D#cccccc><IMG height=3D1=20
            src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D5=20
            NOSEND=3D"1"></TD>
          <TD width=3D122 bgColor=3D#cccccc><A=20
            =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0LU0AV"><IMG=20
            alt=3D"advanced search"=20
            =
src=3D"http://mailart.nature.com/naturetoc/button_advancedsrch.gif"=20
            border=3D0 =
NOSEND=3D"1"></A></TD></TR></FORM></TBODY></TABLE></TD>
    <TD width=3D183 bgColor=3D#cccccc><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnf0AT"><IMG =

      =
src=3D"http://mailart.nature.com/naturetoc//button_subscribe_2.gif" =
border=3D0=20
      NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><!--SEARCH BAR END-->
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
NOSEND=3D"1"></TD>
    <TD width=3D590><FONT face=3DVerdana,Arial,Helvetica,Sans-serif =
color=3D#cc3300=20
      size=3D3><B>Table of Contents =
</B></FONT></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
NOSEND=3D"1"></TD>
    <TD width=3D360>
      <TABLE cellSpacing=3D0 cellPadding=3D0 width=3D340 border=3D0>
        <TBODY>
        <TR>
          <TD vAlign=3Dtop width=3D160><IMG height=3D200=20
            =
src=3D"http://mailart.nature.com/naturetoc/cover/cover_nature_jul24.jpg" =

            width=3D150 NOSEND=3D"1"><BR>
            <TABLE cellSpacing=3D0 cellPadding=3D0 width=3D150 =
border=3D0>
              <TBODY>
              <TR>
                <TD height=3D5><IMG height=3D1=20
                  src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
                  NOSEND=3D"1"></TD></TR>
              <TR>
                <TD align=3Dmiddle><FONT =
face=3DVerdana,Arial,Helvetica,Sans-serif=20
                  color=3D#cc3300 size=3D2><B>24 July =
2003</B></FONT></TD></TR>
              <TR>
                <TD height=3D5><IMG height=3D1=20
                  src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
                  NOSEND=3D"1"></TD></TR>
              <TR>
                <TD align=3Dmiddle><A=20
                  =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Jh0Am"><IMG=20
                  height=3D20=20
                  =
src=3D"http://mailart.nature.com/naturetoc/button_access.gif"=20
                  width=3D125 border=3D0 NOSEND=3D"1"></A></TD></TR>
              <TR>
                <TD height=3D10><IMG height=3D1=20
                  src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
                  NOSEND=3D"1"></TD></TR></TBODY></TABLE></TD>
          <TD vAlign=3Dtop width=3D180><FONT=20
            face=3DVerdana,Arial,Helvetica,Sans-serif size=3D2><A=20
            href=3D"#editorial"><FONT=20
            color=3D#cc3300><B>Editorials</B></FONT></A><BR><A =
href=3D"#news"><FONT=20
            color=3D#cc3300><B>News</B></FONT></A><BR><A =
href=3D"#newfeat"><FONT=20
            color=3D#cc3300><B>News Feature</B></FONT></A><BR><A=20
            href=3D"#corresp"><FONT=20
            color=3D#cc3300><B>Correspondence</B></FONT></A><BR><A=20
            href=3D"#bookrvw"><FONT color=3D#669900><B>Books and=20
            Arts</B></FONT></A><BR><A href=3D"#concepts"><FONT=20
            color=3D#669900><B>Concepts</B></FONT></A><BR><A=20
            href=3D"#newsview"><FONT color=3D#0066cc><B>News and=20
            Views</B></FONT></A><BR><A href=3D"#brfcomm"><FONT=20
            color=3D#ff9933><B>Brief Communications</B></FONT></A><BR><A =

            href=3D"#article"><FONT =
color=3D#ff9933><B>Articles</B></FONT></A><BR><A=20
            href=3D"#letters"><FONT color=3D#ff9933><B>Letters to=20
            Nature</B></FONT></A><BR><A href=3D"#newmkt"><FONT=20
            color=3D#0066cc><B>New on the Market</B></FONT></A><BR><A=20
            href=3D"#natjob"><FONT=20
            =
color=3D#cc3300><B>Naturejobs</B></FONT></A><BR></FONT></TD></TR></TBODY>=
</TABLE></TD>
    <TD vAlign=3Dtop width=3D230>
      <TABLE cellSpacing=3D0 cellPadding=3D1 width=3D210 =
bgColor=3D#336666 border=3D0>
        <TBODY>
        <TR>
          <TD>
            <TABLE cellSpacing=3D0 cellPadding=3D8 width=3D223 =
border=3D0>
              <TBODY>
              <TR>
                <TD vAlign=3Dtop bgColor=3D#ffffff height=3D129>
                  <P><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
                  color=3D#000000 size=3D1><B>This alert is supported by =
Okinawa=20
                  Institute of Science and Technology (OIST)=20
                  Project<BR></B></FONT><FONT=20
                  face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D1>Invitation=20
                  to the International Symposium "New Horizons in =
Molecular=20
                  Sciences and Systems: An Integrated =
Approach"<BR>October=20
                  16&#8211;18, 2003 in Okinawa, Japan<BR>This symposium =
will promote=20
                  OIST which aims to make a new paradigm of integrated=20
                  approaches in science and technology.<BR>Special =
Lecture:=20
                  Jerome Friedman (MIT) Keynote Speakers: Leroy Hood =
(Inst for=20
                  Systems Biology), Richard Karp (UC Berkeley), Steve =
Chu=20
                  (Stanford U), Uri Sagman (C Sixty Inc)<BR><B>For more=20
                  information: <A=20
                  =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CnB0Ar"><FONT=
=20
                  =
color=3D#990000>www.okinawasympo2003.jp</FONT></A></B></FONT></P></TD></T=
R></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE><!-=
- Marketing text / feature of the week //-->
<DIV align=3Dcenter></DIV>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D1 width=3D600 bgColor=3D#ffcc00 =
border=3D0>
  <TBODY>
  <TR>
    <TD>
      <TABLE height=3D135 cellSpacing=3D0 cellPadding=3D0 width=3D598 =
bgColor=3D#ffffff=20
      border=3D0>
        <TBODY>
        <TR>
          <TD width=3D8 height=3D10></TD></TR>
        <TR>
          <TD width=3D8></TD>
          <TD width=3D12 bgColor=3D#ffffcc height=3D119>&nbsp;</TD>
          <TD width=3D557 bgColor=3D#ffffcc height=3D119>
            <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2><B>No=20
            Nature, no impact. </B></FONT></P>
            <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif"=20
            size=3D2><I>Nature</I>'s 2002 ISI impact factor has reached =
an=20
            all-time high of 30.4. To celebrate, we are offering a 30% =
discount=20
            to <I>Nature</I> for one month only. <A=20
            =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnf0AT"><BR><=
FONT=20
            color=3D#990000>Click here to take up this special=20
            offer</FONT></A></FONT></P></TD>
          <TD width=3D9 bgColor=3D#ffffcc height=3D119>&nbsp;</TD>
          <TD width=3D12 height=3D119></TD>
        <TR>
          <TD width=3D8 height=3D9><IMG height=3D1=20
            src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
            =
NOSEND=3D"1"></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D1 width=3D600 bgColor=3D#990000 =
border=3D0>
  <TBODY>
  <TR>
    <TD>
      <TABLE cellSpacing=3D0 cellPadding=3D0 width=3D598 =
bgColor=3D#ffffff border=3D0>
        <TBODY>
        <TR>
          <TD height=3D10><IMG height=3D1=20
            src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
            NOSEND=3D"1"></TD></TR>
        <TR>
          <TD width=3D10>&nbsp;</TD>
          <TD><FONT face=3DVerdana,Arial,Helvetica,Sans-serif =
size=3D2><B>Feature=20
            of the week</B></FONT> <BR><FONT=20
            face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2><B>Synthetic sex=20
            cells</B><BR>Pioneering biologists are trying to grow eggs =
and sperm=20
            in the lab. In doing so, they&#8217;re entering a technical =
and ethical=20
            minefield. <A=20
            =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CnA0Aq">Click=
=20
            here for this <B>free</B> feature</A>.</FONT>
            <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>For=20
            science, read <I>Nature</I>.</FONT></P></TD>
          <TD width=3D10>&nbsp;</TD>
          <TD></TD>
        <TR>
          <TD height=3D10><IMG height=3D1=20
            src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
            =
NOSEND=3D"1"></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D1 width=3D600 bgColor=3D#000000 =
border=3D0>
  <TBODY>
  <TR>
    <TD>
      <TABLE cellSpacing=3D0 cellPadding=3D0 width=3D598 =
bgColor=3D#ffffff border=3D0>
        <TBODY>
        <TR>
          <TD height=3D10><IMG height=3D1=20
            src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
            NOSEND=3D"1"></TD></TR>
        <TR>
          <TD width=3D10>&nbsp;</TD>
          <TD><FONT face=3D"Verdana, Arial, Helvetica, sans-serif"=20
            size=3D2><B>NatureEvents advertisement</B></FONT>
            <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>NEW -=20
            MSc SCIENCE ENTREPRENEURSHIP<BR></FONT><FONT=20
            face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>Are =
you a=20
            scientist with a desire to lead?</FONT></P>
            <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>You're=20
            already building your professional career and would like to =
go=20
            further<BR></FONT><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
            size=3D2>Would you like to develop skills in =
entrepreneurship,=20
            innovation and new venture creation?<BR></FONT><FONT=20
            face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>Join =
a world=20
            class business school and learn from expert academics and =
proven=20
            entrepreneurs. Part-time course begins in September =
2003</FONT></P>
            <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>For=20
            more information email <A=20
            href=3D"mailto:[hidden email]">[hidden email]</A>, =
or visit=20
            <A=20
            =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CnC0As">www.s=
imfonec.co.uk</A><BR>Simfonec,=20
            6th Floor, Cass Business School, 106 Bunhill Row, London, =
EC1Y=20
            8TZ<BR></FONT><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
            size=3D2>Tel: [phone] Fax: [phone] =
8882</FONT></P></TD>
          <TD width=3D10>&nbsp;</TD>
          <TD></TD>
        <TR>
          <TD height=3D10><IMG height=3D1=20
            src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
            =
NOSEND=3D"1"></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE><!--End of Marketing text / =
feature of the week //--><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1 src=3D"homeimages/spacer.gif"=20
  width=3D1></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#cc3300 height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#cc3300><FONT face=3DVerdana =
color=3D#ffffff=20
      size=3D2><B>Editorials<A name=3Deditorial></A></B></FONT></TD>
    <TD align=3Dright width=3D304 bgColor=3D#cc3300><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_red.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif">A=20
      calm view of video violence</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>355</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>Studies of =
violence in=20
      the media and its effects on people are clouded by overheated =
rhetoric and=20
      exaggerated claims. More clarity is needed, both in the science =
and in the=20
      way it is discussed. <BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424355a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cng0AU">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif">The=20
      grand challenges facing physics</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>355</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>It would =
be easy to=20
      delay the prioritization of major new projects at US physics =
laboratories,=20
      but it needs to be done. <BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424355b<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnh0AV">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1 src=3D"homeimages/spacer.gif"=20
  width=3D1></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#cc3300 height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#cc3300><FONT face=3DVerdana =
color=3D#ffffff=20
      size=3D2><B>News<A name=3Dnews></A></B></FONT></TD>
    <TD align=3Dright width=3D304 bgColor=3D#cc3300><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_red.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Physics poised for =
sizeable=20
      gains in energy department's wish-list</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>357</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424357a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cni0AW">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif">US=20
      observation initiative calls for fresh view of =
Earth</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>357</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424357b<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnj0AX">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif">UK=20
      experts map out route to licensing transgenic =
crops</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>358</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424358a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnk0AY">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Dispute over data =
privacy=20
      halts cancer study</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>359</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424359a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnl0AZ">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">African project =
seeks model=20
      solution to water shortage</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>359</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424359b<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnm0Aa">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Brain region linked =
to=20
      post-terror stress</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>360</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424360a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnn0Ab">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Museum trustees =
quit after=20
      row over sale of artefacts</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>360</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424360b<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cno0Ac">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif">HIV=20
      drug resistance triggers strategic switch</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>361</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424361a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnp0Ad">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif">US=20
      budgets for physical endeavour</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>361</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424361b<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnq0Ae">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">news in =
brief</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>362</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424362a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnr0Af">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1 src=3D"homeimages/spacer.gif"=20
  width=3D1></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#cc3300 height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#cc3300><FONT face=3DVerdana =
color=3D#ffffff=20
      size=3D2><B>News Feature<A name=3Dnewfeat></A></B></FONT></TD>
    <TD align=3Dright width=3D304 bgColor=3D#cc3300><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_red.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD>
      <P><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Developmental =
biology:=20
      Synthetic sex cells</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>364</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>Some =
pioneering=20
      biologists are trying to grow eggs and sperm in the lab. In doing =
so,=20
      they're entering a technical and ethical minefield. Carina Dennis =
reports.=20
      <BR></FONT><FONT face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424364a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cns0Ag">Full =

      Text</A></SPAN></FONT></P>
      <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CnA0Aq">Click=
=20
      here for special germ cell web=20
focus</A></FONT></P></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Video violence: =
Playing with=20
      fire?</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#cc3300>&nbsp;<B>367</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>The latest =
computer=20
      games involve pretty gruesome scenes &#8212; severed limbs and =
drive-by=20
      shootings are standard fare. But opinion is divided on whether =
such games=20
      spark real-life violence. Tony Reichhardt investigates. =
<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424367a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnt0Ah">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1 src=3D"homeimages/spacer.gif"=20
  width=3D1></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#cc3300 height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#cc3300><FONT face=3DVerdana =
color=3D#ffffff=20
      size=3D2><B>Correspondence<A name=3Dcorresp></A></B></FONT></TD>
    <TD align=3Dright width=3D304 bgColor=3D#cc3300><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_red.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Military-funded =
research is=20
      not unethical</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#cc3300>&nbsp;<B>369</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>The key is =
to ensure=20
      that it is the military rather than the scientists who are =
regulated.=20
      <BR></FONT><FONT face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424369a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnu0Ai">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Military: brain =
machine could=20
      benefit millions</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>369</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424369b<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnv0Aj">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Authorities should =
note=20
      sponsorship&#8211;results link</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#cc3300>&nbsp;<B>369</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424369c<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnw0Ak">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1 src=3D"homeimages/spacer.gif"=20
  width=3D1></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#669900 height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#669900><FONT face=3DVerdana =
color=3D#ffffff=20
      size=3D2><B>Books and Arts<A name=3Dbookrvw></A></B></FONT></TD>
    <TD align=3Dright width=3D304 bgColor=3D#669900><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_green.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Uncertainty=20
      rules</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#669900>&nbsp;<B>371</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>P.&nbsp;READ&nbsp;MONTAGUE reviews Decisions, =
Uncertainty, and the=20
      Brain: The Science of Neuroeconomics by Paul W. =
Glimcher<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>Neuroeconomics seeks=20
      to move brain studies beyond the fixed reflex. <BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424371a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnx0Al">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Beauty and the=20
      bees</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#669900>&nbsp;<B>372</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>THOMAS&nbsp;D.&nbsp;SEELEY reviews Form and Function in =
the Honey=20
      Bee by Lesley Goodman<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424372a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cny0Am">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Universal=20
      support</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#669900>&nbsp;<B>373</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>SEAN&nbsp;CARROLL=20
      reviews Echo of the Big Bang by Michael Lemonick<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424373a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnz0An">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Vesalius's=20
      vessels</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#669900>&nbsp;<B>373</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>MARY&nbsp;PURTON<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424373b<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cn10Aa">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1 src=3D"homeimages/spacer.gif"=20
  width=3D1></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#669900 height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#669900><FONT face=3DVerdana =
color=3D#ffffff=20
      size=3D2><B>Concepts<A name=3Dconcepts></A></B></FONT></TD>
    <TD align=3Dright width=3D304 bgColor=3D#669900><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_green.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Race: A genetic=20
      melting-pot</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#669900>&nbsp;<B>374</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>MARCUS&nbsp;W.&nbsp;FELDMAN, =
RICHARD&nbsp;C.&nbsp;LEWONTIN &amp;=20
      MARY-CLAIRE&nbsp;KING<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>Ancestral =
genetic data=20
      are far more useful for medical purposes than are racial =
categories, which=20
      may be correlated with disease for social or economic rather than=20
      biological reasons. <BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424374a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cn20Ab">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1 src=3D"homeimages/spacer.gif"=20
  width=3D1></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#0066cc height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#0066cc><FONT face=3DVerdana =
color=3D#ffffff=20
      size=3D2><B>News and Views<A name=3Dnewsview></A></B></FONT></TD>
    <TD align=3Dright width=3D304 bgColor=3D#0066cc><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_blue.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Developmental =
biology: A tale=20
      of tails</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#0066cc>&nbsp;<B>375</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>CHRISTOF&nbsp;NIEHRS<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>Developing =
organisms=20
      still hold many surprises for biologists. For instance, an =
entirely new=20
      'organizer' &#8212; a clump of cells that tells other cells what =
to do &#8212; has=20
      been discovered at a very early stage of zebrafish development.=20
      <BR></FONT><FONT face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424375a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cn30Ac">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Particle physics: =
Strange=20
      days</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#0066cc>&nbsp;<B>376</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>FRANK&nbsp;CLOSE<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>Three new =
subatomic=20
      particles have been found, and all survive for an unusually long =
time=20
      before they decay. Physicists now face the challenge of explaining =
this=20
      within the framework of the existing theory. <BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424376a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cn40Ad">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Neurobiology: =
Caught in the=20
      act</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =

      color=3D#0066cc>&nbsp;<B>377</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>YADIN&nbsp;DUDAI<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>Researchers may have=20
      seen the signature of a memory in the making. In monkeys that =
learnt to=20
      associate two stimuli, single neurons changed their responses =
before,=20
      during or after learning became evident. <BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424377a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cn50Ae">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Materials science: =
On the=20
      straight and narrow</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#0066cc>&nbsp;<B>378</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>RICHARD&nbsp;A.&nbsp;REGISTER<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>Nanoscale =
chemical=20
      patterns written on a substrate can direct the self-assembly of =
polymer=20
      overlayers with remarkable precision. These polymer films, in =
turn, can be=20
      used as templates for nanofabrication. <BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424378a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cn60Af">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Developmental =
biology:=20
      Boundary lines</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#0066cc>&nbsp;<B>379</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>SETH&nbsp;S.&nbsp;BLAIR<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>Embryonic =
development=20
      is a complicated business, as a recent meeting bore witness. The =
signals=20
      generated at the boundaries between compartments were a key topic =
of=20
      discussion. <BR></FONT><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      size=3D1>doi:10.1038/424379a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cn70Ag">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Neurobiology: A new =
way to=20
      network</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#0066cc>&nbsp;<B>381</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>PATRICK&nbsp;MEHLEN<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>Guidance =
molecules=20
      called semaphorins ensure that nerve cells grow in the correct =
direction=20
      during development. It now appears that one semaphorin interacts =
with=20
      integrin proteins to produce another effect. <BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424381a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cn80Ah">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif">100=20
      and 50 years ago</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#0066cc>&nbsp;<B>381</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424381b<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoA0Ar">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Astronomy: An early =
stellar=20
      nursery</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#0066cc>&nbsp;<B>382</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>PHILIP&nbsp;SOLOMON<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>Searching =
for distant=20
      objects in our Universe is equivalent to looking back in time, to =
the=20
      early origins of stars and galaxies. The most distant object known =
shows=20
      the earliest evidence of star formation. <BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424382a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoB0As">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Obituary: Ira =
Herskowitz=20
      (1946&#8211;2003)</FONT></B><FONT face=3D"Verdana, Arial, =
Helvetica, sans-serif"=20
      color=3D#0066cc>&nbsp;<B>384</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>ALEXANDER&nbsp;JOHNSON=20
      AND MARK&nbsp;PTASHNE<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424384a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoC0At">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">news and views in=20
      brief</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#0066cc>&nbsp;<B>385</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424385a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoD0Au">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1 src=3D"homeimages/spacer.gif"=20
  width=3D1></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#ff9933 height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#ff9933><FONT face=3DVerdana =
color=3D#ffffff=20
      size=3D2><B>Brief Communications<A =
name=3Dbrfcomm></A></B></FONT></TD>
    <TD align=3Dright width=3D304 bgColor=3D#ff9933><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_orange.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Insect behaviour: =
Reversal of=20
      sex roles in nuptial feeding</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>387</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>G&Ouml;RAN&nbsp;ARNQVIST,=20
      THER&Eacute;SA&nbsp;M.&nbsp;JONES &amp; =
MARK&nbsp;A.&nbsp;ELGAR<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>Female =
Zeus bugs=20
      subvert the traditional notion that amorous gifts are a male =
preserve.=20
      <BR></FONT><FONT face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424387a<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoE0Av">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoF0Aw">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Psychophysics: Bees =
trade off=20
      foraging speed for accuracy</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>388</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>LARS&nbsp;CHITTKA,=20
      ADRIAN&nbsp;G.&nbsp;DYER, FIOLA&nbsp;BOCK &amp;=20
      ANNA&nbsp;DORNHAUS<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424388a<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoG0Ax">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoH0Ay">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Endocrinology: Bone =

      adaptation requires oestrogen receptor-&#945;</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>389</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>KARLA&nbsp;LEE,=20
      HELEN&nbsp;JESSOP, ROSEMARY&nbsp;SUSWILLO, GUL&nbsp;ZAMAN &amp;=20
      LANCE&nbsp;LANYON<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424389a<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoI0Az">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoJ0A1">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Metallurgy =
(communication=20
      arising): Stainless-steel corrosion and MnS =
inclusions</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>389</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>Q.&nbsp;MENG,=20
      G.&nbsp;S.&nbsp;FRANKEL, H.&nbsp;O.&nbsp;COLIJN &amp;=20
      S.&nbsp;H.&nbsp;GOSS<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424389b<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoK0A2">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoL0A3">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Metallurgy =
(communication=20
      arising): Stainless-steel corrosion and MnS =
inclusions</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>390</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>MARY&nbsp;P.&nbsp;RYAN, DAVID&nbsp;E.&nbsp;WILLIAMS,=20
      RICHARD&nbsp;J.&nbsp;CHATER, BERNIE&nbsp;M.&nbsp;HUTTON &amp;=20
      DAVID&nbsp;S.&nbsp;MCPHAIL<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424390a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoM0A4">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1 src=3D"homeimages/spacer.gif"=20
  width=3D1></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#ff9933 height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#ff9933><FONT face=3DVerdana =
color=3D#ffffff=20
      size=3D2><B>Articles<A name=3Darticle></A></B></FONT></TD>
    <TD align=3Dright width=3D304 bgColor=3D#ff9933><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_orange.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Class 3 semaphorins =
control=20
      vascular morphogenesis by inhibiting integrin =
function</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>391</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>GUIDO&nbsp;SERINI,=20
      DONATELLA&nbsp;VALDEMBRI, SARA&nbsp;ZANIVAN, GIULIA&nbsp;MORTERRA, =

      CONSTANZE&nbsp;BURKHARDT, FRANCESCA&nbsp;CACCAVARI, =
LUCA&nbsp;ZAMMATARO,=20
      LUCA&nbsp;PRIMO, LUCA&nbsp;TAMAGNONE, MALCOLM&nbsp;LOGAN,=20
      MARC&nbsp;TESSIER-LAVIGNE, MASAHIKO&nbsp;TANIGUCHI,=20
      ANDREAS&nbsp;W.&nbsp;P&Uuml;SCHEL &amp; =
FEDERICO&nbsp;BUSSOLINO<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01784<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoN0A5">Summa=
ry</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoO0A6">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Semaphorin 7A =
promotes axon=20
      outgrowth through integrins and MAPKs</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>398</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>R.&nbsp;JEROEN&nbsp;PASTERKAMP, =
JACQUES&nbsp;J.&nbsp;PESCHON,=20
      MELANIE&nbsp;K.&nbsp;SPRIGGS &amp;=20
      ALEX&nbsp;L.&nbsp;KOLODKIN<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01790<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoP0A7">Summa=
ry</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoQ0A8">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1 src=3D"homeimages/spacer.gif"=20
  width=3D1></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#ff9933 height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#ff9933><FONT face=3DVerdana =
color=3D#ffffff=20
      size=3D2><B>Letters to Nature<A =
name=3Dletters></A></B></FONT></TD>
    <TD align=3Dright width=3D304 bgColor=3D#ff9933><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_orange.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Molecular gas in =
the host=20
      galaxy of a quasar at redshift <I>z</I> =3D 6.42</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>406</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>FABIAN&nbsp;WALTER,=20
      FRANK&nbsp;BERTOLDI, CHRIS&nbsp;CARILLI, PIERRE&nbsp;COX,=20
      K.&nbsp;Y.&nbsp;LO, ROBERTO&nbsp;NERI, XIAOHUI&nbsp;FAN, =
ALAIN&nbsp;OMONT,=20
      MICHAEL&nbsp;A.&nbsp;STRAUSS &amp;=20
      KARL&nbsp;M.&nbsp;MENTEN<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01821<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoR0AA">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoS0AB">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Rotational =
actuators based on=20
      carbon nanotubes</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>408</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>A.&nbsp;M.&nbsp;FENNIMORE, T.&nbsp;D.&nbsp;YUZVINSKY,=20
      WEI-QIANG&nbsp;HAN, M.&nbsp;S.&nbsp;FUHRER, J.&nbsp;CUMINGS &amp;=20
      A.&nbsp;ZETTL<BR></FONT><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      size=3D1>doi:10.1038/nature01823<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoT0AC">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoU0AD">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Epitaxial =
self-assembly of=20
      block copolymers on lithographically defined nanopatterned=20
      substrates</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#ff9933>&nbsp;<B>411</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>SANG&nbsp;OUK&nbsp;KIM, HARUN&nbsp;H.&nbsp;SOLAK,=20
      MARK&nbsp;P.&nbsp;STOYKOVICH, NICOLA&nbsp;J.&nbsp;FERRIER,=20
      JUAN&nbsp;J.&nbsp;DE&nbsp;PABLO &amp;=20
      PAUL&nbsp;F.&nbsp;NEALEY<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01775<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoV0AE">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoW0AF">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Carbon solubility =
in olivine=20
      and the mode of carbon storage in the Earth's =
mantle</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>414</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>HANS&nbsp;KEPPLER,=20
      MICHAEL&nbsp;WIEDENBECK &amp;=20
      SVYATOSLAV&nbsp;S.&nbsp;SHCHEKA<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01828<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoX0AG">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoY0AH">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Reflection =
signature of=20
      seismic and aseismic slip on the northern Cascadia subduction=20
      interface</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#ff9933>&nbsp;<B>416</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>MLADEN&nbsp;R.&nbsp;NEDIMOVI<IMG alt=3D"C acute"=20
      =
src=3D"http://www.nature.com/__chars/_c/special/acute/black/med/base/glyp=
h.gif"=20
      align=3Dtop border=3D0 NOSEND=3D"1">, ROY&nbsp;D.&nbsp;HYNDMAN,=20
      KUMAR&nbsp;RAMACHANDRAN &amp; =
GEORGE&nbsp;D.&nbsp;SPENCE<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01840<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CoZ0AI">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Coa0AP">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Catastrophic =
extinctions=20
      follow deforestation in Singapore</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>420</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>BARRY&nbsp;W.&nbsp;BROOK, NAVJOT&nbsp;S.&nbsp;SODHI &amp; =

      PETER&nbsp;K.&nbsp;L.&nbsp;NG<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01795<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cob0AQ">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Coc0AR">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, =
sans-serif">Productivity&#8211;biodiversity=20
      relationships depend on the history of community =
assembly</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>423</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>TADASHI&nbsp;FUKAMI=20
      AND PETER&nbsp;J.&nbsp;MORIN<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01785<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cod0AS">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Coe0AT">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif">The=20
      role of neuronal identity in synaptic competition</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>426</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>NARAYANAN&nbsp;KASTHURI AND=20
      JEFF&nbsp;W.&nbsp;LICHTMAN<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01836<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cof0AU">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cog0AV">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Genetic evidence =
that=20
      relative synaptic efficacy biases the outcome of synaptic=20
      competition</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#ff9933>&nbsp;<B>430</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>MARIO&nbsp;BUFFELLI,=20
      ROBERT&nbsp;W.&nbsp;BURGESS, GUOPING&nbsp;FENG,=20
      CORRINNE&nbsp;G.&nbsp;LOBE, JEFF&nbsp;W.&nbsp;LICHTMAN &amp;=20
      JOSHUA&nbsp;R.&nbsp;SANES<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01844<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Coh0AW">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Coi0AX">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Anandamide and =
arachidonic=20
      acid use epoxyeicosatrienoic acids to activate TRPV4=20
      channels</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#ff9933>&nbsp;<B>434</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>HIROYUKI&nbsp;WATANABE, JORIS&nbsp;VRIENS, =
JEAN&nbsp;PRENEN,=20
      GUY&nbsp;DROOGMANS, THOMAS&nbsp;VOETS &amp;=20
      BERND&nbsp;NILIUS<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01807<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Coj0AY">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cok0AZ">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif">The=20
      expression domain of <I>PHANTASTICA</I> determines leaflet =
placement in=20
      compound leaves</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>438</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>MINSUNG&nbsp;KIM,=20
      SHEILA&nbsp;MCCORMICK, MARJA&nbsp;TIMMERMANS &amp;=20
      NEELIMA&nbsp;SINHA<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01820<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Col0Aa">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Com0Ab">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">GATA4 mutations =
cause human=20
      congenital heart defects and reveal an interaction with=20
      TBX5</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#ff9933>&nbsp;<B>443</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>VIDU&nbsp;GARG,=20
      IRFAN&nbsp;S.&nbsp;KATHIRIYA, ROBERT&nbsp;BARNES,=20
      MARIE&nbsp;K.&nbsp;SCHLUTERMAN, ISABELLE&nbsp;N.&nbsp;KING,=20
      CHERYL&nbsp;A.&nbsp;BUTLER, CARYN&nbsp;R.&nbsp;ROTHROCK,=20
      REENU&nbsp;S.&nbsp;EAPEN, KAYOKO&nbsp;HIRAYAMA-YAMADA, =
KUNITAKA&nbsp;JOO,=20
      RUMIKO&nbsp;MATSUOKA, JONATHAN&nbsp;C.&nbsp;COHEN &amp;=20
      DEEPAK&nbsp;SRIVASTAVA<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01827<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Con0Ac">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Coo0Ad">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif">The=20
      molecular nature of the zebrafish tail organizer</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>448</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>ANTOINE&nbsp;AGATHON,=20
      CHRISTINE&nbsp;THISSE &amp; BERNARD&nbsp;THISSE<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01822<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cop0Ae">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Coq0Af">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">WAVE2 is required =
for=20
      directed cell migration and cardiovascular =
development</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>452</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>DAISUKE&nbsp;YAMAZAKI,=20
      SHIRO&nbsp;SUETSUGU, HIROAKI&nbsp;MIKI, YUKI&nbsp;KATAOKA,=20
      SHIN-ICHI&nbsp;NISHIKAWA, TAKASHI&nbsp;FUJIWARA, =
NOBUAKI&nbsp;YOSHIDA=20
      &amp; TADAOMI&nbsp;TAKENAWA<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01770<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cor0Ag">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cos0Ah">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Epidermal growth =
factor=20
      receptor is a cellular receptor for human =
cytomegalovirus</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>456</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>XIN&nbsp;WANG,=20
      SHU-MEI&nbsp;HUONG, MARIE&nbsp;L.&nbsp;CHIU, NANCY&nbsp;RAAB-TRAUB =
&amp;=20
      ENG-SHANG&nbsp;HUANG<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01818<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cot0Ai">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cou0Aj">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">RhoG activates Rac1 =
by direct=20
      interaction with the Dock180-binding protein Elmo</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>461</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2>HIRONORI&nbsp;KATOH=20
      AND MANABU&nbsp;NEGISHI<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01817<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cov0Ak">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cow0Al">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Crystal structure =
of human=20
      cytochrome P450 2C9 with bound warfarin</FONT></B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      color=3D#ff9933>&nbsp;<B>464</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>PAMELA&nbsp;A.&nbsp;WILLIAMS, JOSE&nbsp;COSME, =
ALISON&nbsp;WARD,=20
      HAYLEY&nbsp;C.&nbsp;ANGOVE, DIJANA&nbsp;MATAK&nbsp;VINKOVI<IMG=20
      alt=3D"C acute"=20
      =
src=3D"http://www.nature.com/__chars/_c/special/acute/black/med/base/glyp=
h.gif"=20
      align=3Dtop border=3D0 NOSEND=3D"1"> &amp; =
HARREN&nbsp;JHOTI<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nature01862<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cox0Am">First=
&nbsp;paragraph</A>=20
      | <SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Coy0An">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1 src=3D"homeimages/spacer.gif"=20
  width=3D1></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#0066cc height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#0066cc><FONT face=3DVerdana =
color=3D#ffffff=20
      size=3D2><B>New on the Market<A name=3Dnewmkt></A></B></FONT></TD>
    <TD align=3Dright width=3D304 bgColor=3D#0066cc><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_blue.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif">Gene expression,=20
      amplification</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#0066cc>&nbsp;<B>469</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" size=3D2>PCR, =
thermocyclers and=20
      some more software that works with Mac OS X. <BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/424469a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Coz0Ao">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1 src=3D"homeimages/spacer.gif"=20
  width=3D1></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#cc3300 height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#cc3300><FONT face=3DVerdana =
color=3D#ffffff=20
      size=3D2><B>Naturejobs<A name=3Dnatjob></A></B></FONT></TD>
    <TD align=3Dright width=3D304 bgColor=3D#cc3300><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_red.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif">A=20
      team effort</FONT></B><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      color=3D#cc3300>&nbsp;<B>471</B></FONT></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D2>PAUL&nbsp;SMAGLIK<BR></FONT><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nj6947-471a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Co10Ab">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT size=3D2><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, =
sans-serif">Movers</FONT></B></FONT><BR><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif"=20
      size=3D1>doi:10.1038/nj6947-472a<BR><SPAN class=3Dlinks><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Co20Ac">Full =

      Text</A></SPAN></FONT></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D11>&nbsp;</TD>
    <TD width=3D593><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =

      size=3D2>Find out more about the The Guardian/Naturejobs =
recruitment=20
      collaboration in the UK.<BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0s10AY">www.na=
ture.com/naturejobs/promotion/guard.html</A></FONT></TD></TR></TBODY></TA=
BLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D11>&nbsp;</TD>
    <TD width=3D593><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =

      size=3D2><B>For the latest career issues and hot jobs visit <A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0RU0Ab">www.na=
turejobs.com</A>.=20
      The free online careers resource for=20
scientists.</B></FONT></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#cc3300 height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#cc3300><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" color=3D#ffffff=20
      size=3D2>natureevents</FONT><A name=3Dnatureevents></A></B></TD>
    <TD align=3Dright width=3D304 bgColor=3D#cc3300><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_red.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 height=3D210>&nbsp;</TD>
    <TD height=3D210><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
      size=3D2>Events are vital for the contemporary scientist. From =
delegates=20
      discussing hot issues and opinion, through to networking at =
conferences,=20
      meetings provide a platform for learning and advancement. </FONT>
      <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2><B>So with a=20
      burgeoning number of conferences across the globe, where can =
scientists go=20
      to gain a complete resource?</B></FONT></P>
      <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2><B><FONT=20
      color=3D#cc3300>nature</FONT>events</B> is a fully searchable,=20
      multi-disciplinary database designed to maximise exposure for PCOs =
and=20
      academics alike. All the information you need for scheduling event =

      attendance for the year ahead.<BR><BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0pk0AT"><B>www=
.natureevents.com</B></A>=20
      </FONT></P></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D15><IMG height=3D10=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10 bgColor=3D#cc3300 height=3D20>&nbsp;</TD>
    <TD width=3D290 bgColor=3D#cc3300><B><FONT=20
      face=3D"Verdana, Arial, Helvetica, sans-serif" color=3D#ffffff =
size=3D2>Nature=20
      Science Update</FONT><A name=3Dnsu></A></B></TD>
    <TD align=3Dright width=3D304 bgColor=3D#cc3300><A =
href=3D"#top"><IMG height=3D20=20
      src=3D"http://mailart.nature.com/naturetoc/button_top_red.gif" =
width=3D50=20
      border=3D0 NOSEND=3D"1"></A></TD></TR></TBODY></TABLE><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2><B>This=20
      week's Nature Science Update <A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Jy0A4">www.na=
ture.com/nsu</A>=20
      includes:</B></FONT>
      <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnb0AP">OLD=20
      TREES POOR CARBON SPONGE?</A><BR>Carbon stockpiles question idea =
that=20
      forests will counteract global warming. <BR></FONT></P>
      <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cnc0AQ">DIREC=
T=20
      EVIDENCE FOUND FOR DARK ENERGY</A><BR>Mysterious force of cosmic=20
      acceleration marked Big Bang's afterglow.<BR></FONT></P>
      <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Clb0AN">SARS =

      DATABASE RAMPS UP</A><BR>Coronavirus website collates viral =
vitals.=20
      <BR></FONT></P>
      <P><FONT face=3D"Verdana, Arial, Helvetica, sans-serif" =
size=3D2><B>For more=20
      news like this visit Nature Science Update, the NPG's =
free<BR>popular=20
      science daily webzine, every day: <A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Jy0A4">www.na=
ture.com/nsu</A></B></FONT></P></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D604 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D15><IMG height=3D15=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1 =
NOSEND=3D"1">
      <TABLE cellSpacing=3D0 cellPadding=3D1 width=3D600 =
bgColor=3D#000000 border=3D0>
        <TBODY>
        <TR>
          <TD>
            <TABLE height=3D118 cellSpacing=3D0 cellPadding=3D0 =
width=3D598=20
            bgColor=3D#ffffff border=3D0>
              <TBODY>
              <TR>
                <TD width=3D16 height=3D10><IMG height=3D1=20
                  src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
                  NOSEND=3D"1"></TD></TR>
              <TR>
                <TD width=3D16 height=3D106>&nbsp;</TD>
                <TD width=3D582 height=3D106>
                  <P><FONT face=3D"Verdana, Arial, Helvetica, =
sans-serif"=20
                  size=3D2>Stuck in a rut? <B>Free access articles from=20
                  Naturejobs: SPOTLIGHTS &amp; REGIONS</B> (tours of =
scientific=20
                  hubs)<A=20
                  =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0hF0Ai">=20
                  www.nature.com/naturejobs/spotlight/</A> <BR>SPECIAL =
REPORTS=20
                  (examinations of jobs issues on both sides of the =
bench) <A=20
                  =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0CRV0Aj">www.n=
ature.com/naturejobs/specialreport/</A></FONT>=20
                  </P></TD></TR>
              <TR>
                <TD width=3D16 height=3D2><IMG height=3D1=20
                  src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
                  =
NOSEND=3D"1"></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></T=
R></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" border=3D0>
  <TBODY>
  <TR>
    <TD =
background=3Dhttp://mailart.nature.com/naturetoc/dothoriz.gif><IMG=20
      height=3D1 src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
      NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1 =
NOSEND=3D"1">
      <TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
        <TBODY>
        <TR>
          <TD height=3D10><IMG height=3D1=20
            src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
            =
NOSEND=3D"1"></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD><FONT face=3DVerdana,Arial,Helvetica,Sans-serif size=3D1>
      <P>Please note that you need to be a subscriber or site-licence =
holder to=20
      enjoy full-textaccess to Nature. To purchase a subscription, =
please visit=20
      <A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Cm80Ag">www.n=
ature.com/nature/subscribe/=20
      </A></P>
      <P>You have been sent this Table of Contents Alert because you =
have chosen=20
      to receive it. You can change your e-mail alert preferences at any =
time,=20
      by modifying your preferences on your current account at: <BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Ju0Az">www.na=
ture.com/registration/Modify_registration.taf</A>=20
      <BR>(You will need to log in to be recognised as a Nature =
registrant) </P>
      <P>To discontinue all email services from the Nature Publishing =
Group=20
      click on the link below: <BR><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0KZ0AZ&amp;e=3D=
[hidden email]">www.nature.com/mar/sup/index.taf?e=[hidden email]=20
      </A></P><A=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0gA0Ac"><IMG=20
      height=3D143 =
src=3D"http://mailart.nature.com/naturetoc/logo_dna50th.gif"=20
      width=3D120 align=3Dright border=3D0 NOSEND=3D"1"></A>
      <P>For further technical assistance, please contact: <BR><A=20
      =
href=3D"mailto:[hidden email]">mailto:[hidden email]=20
      </A></P>
      <P>For print subscription enquiries, please contact: <BR><A=20
      =
href=3D"mailto:[hidden email]">mailto:[hidden email]<=
/A>=20
      </P>
      <P>For other enquiries, please contact: <BR><A=20
      href=3D"mailto:[hidden email]">mailto:[hidden email]</A> =
</P>
      <P>Nature Publishing Group's worldwide offices: <BR>London - Paris =
-=20
      Munich - New Delhi - Tokyo - Melbourne <BR>San Diego - San =
Francisco -=20
      Washington - New York - Boston =
</P></FONT></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" border=3D0>
  <TBODY>
  <TR>
    <TD =
background=3Dhttp://mailart.nature.com/naturetoc/dothoriz.gif><IMG=20
      height=3D1 src=3D"http://mailart.nature.com/naturetoc/spacer.gif" =
width=3D1=20
      NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD height=3D10><IMG height=3D1=20
      src=3D"http://mailart.nature.com/naturetoc/spacer.gif" width=3D1=20
  NOSEND=3D"1"></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D600 border=3D0>
  <TBODY>
  <TR>
    <TD width=3D10>&nbsp;</TD>
    <TD align=3Dmiddle><FONT face=3DVerdana,Arial,Helvetica,Sans-serif =
size=3D1>
      <P><A class=3Dlocalnav=20
      =
onclick=3D"window.open('http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0=
Ch0Ly0A6','copyright_window','toolbar=3Dno,location=3Dno,directories=3Dno=
,status=3Dno,menubar=3Dno,scrollbars=3Dno,resizable=3Dno,copyhistory=3Dye=
s,width=3D450,height=3D280,top=3D380,left=3D20');return false;"=20
      =
href=3D"http://info.nature.com/cgi-bin24/DM/y/hBLw0BfgQO0Ch0Ly0A6">&copy;=
 2003=20
      Nature Publishing Group</A> =
</P></FONT></TD></TR></TBODY></TABLE></DIV><IMG=20
src=3D"http://info.nature.com/cgi-bin24/flosensing?y=3DBLw0BfgQO0Ch0B2" =
NOSEND=3D"1">=20
</BODY></HTML>

------=_NextPart_000_0022_01C3511A.5941F440--