<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br></div>POPC lipid is defined in the lipid itp file you'll find on the website.<div><br></div><div><a href="http://md.chem.rug.nl/cgmartini/index.php/forcefield-parameters/56-lipids">http://md.chem.rug.nl/cgmartini/index.php/forcefield-parameters/56-lipids</a></div><div><div><br></div><div>POPC coordinate file is indeed not present on the website. However, </div><div>transforming a DOPC or DPPC coordinate file to a POPC coordinate </div><div>file goes only by modifying the central bead name in the first tail for </div><div>DOPC or second tail in DPPC to the one of POPC. Then change the </div><div>residue name. </div><div>Take a topology of DOPC or DPPC, modify what is needed to make </div><div>it be for POPC (basically change the name in it) and then equilibrate </div><div>your box ... </div><div><br></div><div>It is that easy, isn't it beautiful :))</div><div><br><div><div>On Apr 7, 2010, at 2:11 PM, xi zhao wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><table cellspacing="0" cellpadding="0" border="0"><tbody><tr><td valign="top" style="font: inherit;"><div><br><em>I'd like to run simulations with coarse grained model lipid bilayer.<br></em><i> I can not find the force field for coarse grain POPC lipid or equilibrated </i><i>bilayer coordinates in Martini website. Please help me! </i></div> <div><i>thank you!<br></i><br><br><a class="plink" href="http://cn.webmessenger.yahoo.com/index.php?t=1&to=eWlkPXpoYW94aWl0YzIwMDI-&sig=703fa929658518b2720b087c59cd85f2dabf8844" rel="nofollow" target="_blank"><img class="pimg" border="0" alt="4" src="http://opi.yahoo.com/online?u=zhaoxiitc2002&t=4&l=cn"></a></div></td></tr></tbody></table><br> -- <br>gmx-users mailing list <a href="mailto:gmx-users@gromacs.org">gmx-users@gromacs.org</a><br><a href="http://lists.gromacs.org/mailman/listinfo/gmx-users">http://lists.gromacs.org/mailman/listinfo/gmx-users</a><br>Please search the archive at http://www.gromacs.org/search before posting!<br>Please don't post (un)subscribe requests to the list. Use the <br>www interface or send it to gmx-users-request@gromacs.org.<br>Can't post? Read http://www.gromacs.org/mailing_lists/users.php</blockquote></div><br></div></div></body></html>