<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">There is kind of a "cheaty" way to do it if you are using the 1.2255 snapshot by saving a session file and editing it. You need to use an editor that can handle long lines, like TextEdit.app on a Mac or WordPad on Windows. Search for the string 'chain' (including the quotes). You'll see some text that looks something like:<DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>'chain': (29, 'A', {})</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>change the A to B so it looks like:</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>'chain': (29, 'B', {})</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>save the edited session and open it in Chimera and the chain ID will have changed.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>--Eric</DIV><DIV><BR><DIV><DIV>On Aug 28, 2006, at 1:36 PM, Elaine Meng wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite">Hi Yunierkis,<DIV>Sorry, there is no way to change the chain ID in Chimera. You would need to text-edit A to B in the PDB file before opening it. (Or, if you're fetching the structure from the PDB, write it out in PDB format, edit the file, and read it back in.)</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Depending on what you are trying to do, there may be some way of doing it without changing chain ID.</DIV><DIV>Best,</DIV><DIV>Elaine</DIV><DIV><BR><DIV><DIV>On Aug 28, 2006, at 12:48 PM, Yunierkis Perez Castillo wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"> Hi all,<BR> <BR> I need to change the chain ID for a protein, that is, change the chain A to chain B.<BR> Can I do that with chimera?<BR> <BR> Thanks in advance<BR> Yunierkis<BR> <BR><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> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV>-----</DIV><DIV>Elaine C. Meng, Ph.D. <A href="mailto:meng@cgl.ucsf.edu">meng@cgl.ucsf.edu</A></DIV><DIV>UCSF Computer Graphics Lab and Babbitt Lab</DIV><DIV>Department of Pharmaceutical Chemistry</DIV><DIV>University of California, San Francisco</DIV><DIV> <A href="http://www.cgl.ucsf.edu/home/meng/index.html">http://www.cgl.ucsf.edu/home/meng/index.html</A></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR class="khtml-block-placeholder"></DIV><BR class="Apple-interchange-newline"></SPAN> </DIV><BR></DIV><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>