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Hi Bala,<div><span class="Apple-tab-span" style="white-space:pre"> </span>Chimera doesn't write any trajectory formats, so the answer is clearly no. VMD might be able to do this, though I'm guessing it doesn't write the GROMACS .trj file format. There does seem to be a standalone script that does exactly what you want though. It's here:</div><div><br></div><div><a href="http://chemistry.csulb.edu/ffamber/tools.html">http://chemistry.csulb.edu/ffamber/tools.html</a></div><div><br></div><div>--Eric</div><div><br><div><html>On Mar 31, 2008, at 2:42 AM, bala wrote:</html><br class="Apple-interchange-newline"><blockquote type="cite"> <!-- Converted from text/plain format --><p><font size="2">Dear Chimerians,<br> <br> I have an amber trajectory. I want to use gromacs to do some analysis. Is it possible in chimera to<br> i) convert amber traj to gromacs traj format<br> ii) convert amber topo file to gromacs topo format<br> <br> Thanks,<br> Bala<br> </font> </p><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Chimera-users mailing list</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="mailto:Chimera-users@cgl.ucsf.edu">Chimera-users@cgl.ucsf.edu</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users">http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users</a></div> </blockquote></div><br></div></body></html>