Hi,<br><br>You can print the moleculetype definition, up to the system tag using sed:<br><br>sed -n -e &#39;/^\s*\[\s*system\s*\]\s*$/q&#39; -e &#39;/^\s*\[\s*moleculetype\s*\]\s*$/,$p&#39; TOP &gt; ITP<br><br>First expression: quit at [ system ], allowing spaces before, in between and after<br>
Second expression: print everything from [ moleculetype ] to end of file.<br><br>This does assume there is only a single moleculetype definition and no rubbish (#includes) in between.<br><br>Hope it helps,<br><br>Tsjerk<br>
<br><div class="gmail_quote">On Mon, Nov 28, 2011 at 12:22 PM, Mark Abraham <span dir="ltr">&lt;<a href="mailto:Mark.Abraham@anu.edu.au">Mark.Abraham@anu.edu.au</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">

  
    
  
  <div text="#000000" bgcolor="#FFFFFF"><div class="im">
    On 28/11/2011 10:09 PM, yp sun wrote:
    <blockquote type="cite">
      <table border="0" cellpadding="0" cellspacing="0">
        <tbody>
          <tr>
            <td style="font: inherit;" valign="top">I think by running
              pdb2gmx you can get .itp file.<br>
            </td>
          </tr>
        </tbody>
      </table>
    </blockquote>
    <br></div>
    ... only if there are corresponding .rtp entries, which is likely
    not the case for GTP. pdb2gmx is not magic.<span class="HOEnZb"><font color="#888888"><br>
    <br>
    Mark</font></span><div><div class="h5"><br>
    <br>
    <blockquote type="cite">
      <table border="0" cellpadding="0" cellspacing="0">
        <tbody>
          <tr>
            <td style="font: inherit;" valign="top"><br>
              Yeping Sun<br>
              CAS Key Laboratory of Pathogenic Microbiology &amp;
              Immunology<br>
              INSTITUTE OF MICROBIOLOGY CHINESE ACADEMY OF SCIENCES <br>
              NO.1 Beichen West Road,Chaoyang District,Beijing
              100101,china<br>
              <br>
              --- <b>11年11月28日,周一, David van der Spoel <i><a href="mailto:spoel@xray.bmc.uu.se" target="_blank">&lt;spoel@xray.bmc.uu.se&gt;</a></i></b>
              写道:<br>
              <blockquote style="border-left: 2px solid rgb(16, 16, 255); padding-left: 5px; margin-left: 5px;"><br>
                发件人: David van der Spoel <a href="mailto:spoel@xray.bmc.uu.se" target="_blank">&lt;spoel@xray.bmc.uu.se&gt;</a><br>
                主题: Re: [gmx-users] .top to .itp file conversion<br>
                收件人: &quot;Discussion list for GROMACS users&quot;
                <a href="mailto:gmx-users@gromacs.org" target="_blank">&lt;gmx-users@gromacs.org&gt;</a><br>
                日期: 2011年11月28日,周一,下午4:22<br>
                <br>
                <div>On 2011-11-28 09:20, neeru sharma
                  wrote:<br>
                  &gt; Dear gromacs users,<br>
                  &gt;<br>
                  &gt; I have generated Amber topology and coordinate
                  files for GTP molecule.<br>
                  &gt; Then, I converted them into the corresponding
                  gromacs topology (.top)<br>
                  &gt; and coordinate files (.gro). Now, I need to
                  convert this gromacs .top<br>
                  &gt; file into .itp format.<br>
                  &gt; Is there any command in gromacs or any other tool
                  to do so.<br>
                  &gt; Thanks<br>
                  &gt;<br>
                  &gt; ----<br>
                  &gt; Neeru Sharma<br>
                  &gt; CDAC,Pune (India)<br>
                  &gt;<br>
                  &gt;<br>
                  &gt;<br>
                  emacs or vi. your choice.<br>
                  <br>
                  -- <br>
                  David van der Spoel, Ph.D., Professor of Biology<br>
                  Dept. of Cell &amp; Molec. Biol., Uppsala University.<br>
                  Box 596, 75124 Uppsala, Sweden. Phone:&nbsp;&nbsp;&nbsp;
                  <a href="tel:%2B46184714205" value="+46184714205" target="_blank">+46184714205</a>.<br>
                  <a href="http://cn.mc156.mail.yahoo.com/mc/compose?to=spoel@xray.bmc.uu.se" target="_blank">spoel@xray.bmc.uu.se</a>&nbsp;
                  &nbsp; <a href="http://folding.bmc.uu.se/" target="_blank">http://folding.bmc.uu.se</a><br>
                  -- <br>
                  gmx-users mailing list&nbsp; &nbsp; <a href="http://cn.mc156.mail.yahoo.com/mc/compose?to=gmx-users@gromacs.org" target="_blank">gmx-users@gromacs.org</a><br>
                  <a href="http://lists.gromacs.org/mailman/listinfo/gmx-users" target="_blank">http://lists.gromacs.org/mailman/listinfo/gmx-users</a><br>
                  Please search the archive at <a href="http://www.gromacs.org/Support/Mailing_Lists/Search" target="_blank">http://www.gromacs.org/Support/Mailing_Lists/Search</a>
                  before posting!<br>
                  Please don&#39;t post (un)subscribe requests to the list.
                  Use the <br>
                  www interface or send it to <a href="http://cn.mc156.mail.yahoo.com/mc/compose?to=gmx-users-request@gromacs.org" target="_blank">gmx-users-request@gromacs.org</a>.<br>
                  Can&#39;t post? Read <a href="http://www.gromacs.org/Support/Mailing_Lists" target="_blank">http://www.gromacs.org/Support/Mailing_Lists</a><br>
                </div>
              </blockquote>
            </td>
          </tr>
        </tbody>
      </table>
      <br>
      <fieldset></fieldset>
      <br>
    </blockquote>
    <br>
  </div></div></div>

<br>--<br>
gmx-users mailing list &nbsp; &nbsp;<a href="mailto:gmx-users@gromacs.org">gmx-users@gromacs.org</a><br>
<a href="http://lists.gromacs.org/mailman/listinfo/gmx-users" target="_blank">http://lists.gromacs.org/mailman/listinfo/gmx-users</a><br>
Please search the archive at <a href="http://www.gromacs.org/Support/Mailing_Lists/Search" target="_blank">http://www.gromacs.org/Support/Mailing_Lists/Search</a> before posting!<br>
Please don&#39;t post (un)subscribe requests to the list. Use the<br>
www interface or send it to <a href="mailto:gmx-users-request@gromacs.org">gmx-users-request@gromacs.org</a>.<br>
Can&#39;t post? Read <a href="http://www.gromacs.org/Support/Mailing_Lists" target="_blank">http://www.gromacs.org/Support/Mailing_Lists</a><br></blockquote></div><br><br clear="all"><br>-- <br>Tsjerk A. Wassenaar, Ph.D.<br>
<br>post-doctoral researcher<br>Molecular Dynamics Group<br>* Groningen Institute for Biomolecular Research and Biotechnology<br>* Zernike Institute for Advanced Materials<br>University of Groningen<br>The Netherlands<br>