Hi Darrell! Just a note on the automatic "ligand" category: a small molecule by itself would not be identified as ligand, only when it is in the same model as a macromolecule. The automatic category heuristics are here: <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/surface.html#surfcats> Your own specifier would (of course) be based on your advance knowledge of what structures are going to be processed, not just what you want the specifier to include, but also what other stuff might be present that you wish to exclude. Best, Elaine ---------- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco On Jun 5, 2014, at 10:11 AM, "Hurt, Darrell (NIH/NIAID) [E]" <darrellh@niaid.nih.gov> wrote:
I guess one way to do it might be to use a different specifier for ligands, like maybe:
:/numAtoms<100
From: <Hurt>, Darrell Hurt <darrellh@niaid.nih.gov<mailto:darrellh@niaid.nih.gov>> Date: Thursday, June 5, 2014 12:41 PM To: "chimera-users@cgl.ucsf.edu<mailto:chimera-users@cgl.ucsf.edu> BB" <chimera-users@cgl.ucsf.edu<mailto:chimera-users@cgl.ucsf.edu>> Subject: [Chimera-users] "ligand" category for selection
Hi Chimera friends,
I'm trying to use the attached MOL file (dopamine) in Chimera and I want to run a Python script on it. My script does some things to the molecule using selection categories. I'm trying to select this molecule as "ligand", but I get a "No atoms specified" error.
Alternatively, is there a way in Python to ignore the error if I get it and keep processing the rest of the script?
Thanks, Darrell