Hi Beth, I changed the subject line to something more specific. It's OK to ask on this list, but you may be interested that there is a separate mailing list for ChimeraX questions: chimerax-users@cgl.ucsf.edu In ChimeraX the command is "angle" so something like this should work: angle #1/A:601@c7m :222@cb #17/A:602@c7m ChimeraX "angle" command <http://rbvi.ucsf.edu/chimerax/docs/user/commands/angle.html> ChimeraX measurements: <http://rbvi.ucsf.edu/chimerax/docs/user/measurements.html> ChimeraX atomspec: <http://rbvi.ucsf.edu/chimerax/docs/user/commands/atomspec.html> I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

On Oct 29, 2020, at 11:42 AM, M. Elizabeth Stroupe <mestroupe@bio.fsu.edu> wrote:

Hi ChimeraX team,

I need to measure a simple angle between three atoms, two within one model and the third in another model to describe a domain motion.

In Chimera I could do this from the Structure Analysis tab but now it seems you can only measure distances. I tried the following command(s) and they both gave me an error. I also tried including commas between the angles. What am I doing wrong?

angle #1/A:602@C7m,:222@CB,#17/A:602@C7M measure angle #1/A:602@C7m #1/A:222@CB #17/A:602@C7M

Thank you!

Beth _______________________________________________ Chimera-users mailing list: Chimera-users@cgl.ucsf.edu Manage subscription: https://plato.cgl.ucsf.edu/mailman/listinfo/chimera-users