Hi Yeping, unfortunately, the caver plugin doesn't take a selection expression, but only selection names. Regarding your selection expression, you miss the "name" operator. So this should work:
PyMOL> select startsele, chain A and resid 21 and name CA In Caver: "Specify selection: startsele" Hope that helps. Cheers, Thomas sunyep...@aliyun.com wrote, On 07/23/13 02:31: > Dear pymol users, > > Does anyone use the caver plugin of pymol to analyze a ion channel? I > don't know how to specify selection for the starting of plugin. Should > the starting point be at the center of the channel where there is empty > and no atoms in the molecule? or should it be certain atom of the > molecule? If it should be the latter, what is the correct syntax of the > selection? For example, if I want to select CA atom of Try21 in chain A, > should I input the following command? > > chain A and resid 21 and CA > > But this is wrong and does not work. > > Could someone give me some tutorial? Thanks. > > Yeping Sun -- Thomas Holder PyMOL Developer Schrödinger Contractor ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ PyMOL-users mailing list (PyMOL-users@lists.sourceforge.net) Info Page: https://lists.sourceforge.net/lists/listinfo/pymol-users Archives: http://www.mail-archive.com/pymol-users@lists.sourceforge.net
