You can use mmtsb mainly conpdb.pl script, the command center can help you to center your structure.<br id="yMail_cursorElementTracker_1525815415493"><br><div id="ymail_android_signature"><a href="https://overview.mail.yahoo.com/mobile/?.src=Android">Sent from Yahoo Mail on Android</a></div> <br> <blockquote style="margin: 0 0 20px 0;"> <header style="font-family:Roboto, sans-serif; color:#6D00F6;"> <div>On Tue, May 8, 2018 at 9:53 PM, Tom Goddard</div><div>&lt;goddard@sonic.net&gt; wrote:</div> </header> <div style="padding: 10px 0 0 20px; margin: 10px 0 0 0; border-left: 1px solid #6D00F6;"> _______________________________________________<br clear="none">Chimera-users mailing list: <a shape="rect" ymailto="mailto:Chimera-users@cgl.ucsf.edu" href="mailto:Chimera-users@cgl.ucsf.edu">Chimera-users@cgl.ucsf.edu</a><br clear="none">Manage subscription: <a shape="rect" href="http://plato.cgl.ucsf.edu/mailman/listinfo/chimera-users" target="_blank">http://plato.cgl.ucsf.edu/mailman/listinfo/chimera-users</a><br clear="none"> </div> </blockquote>