Hi Bob, Sorry, ChimeraX does not have ResProp too, that's only in Chimera. However, in ChimeraX you can define any number of custom names for command-line specifications such as lists of residues using the "name" command. These definitions could be in a startup script specified in the ChimeraX Preferences (category Startup). <https://rbvi.ucsf.edu/chimerax/docs/user/preferences.html#startup> <https://rbvi.ucsf.edu/chimerax/docs/user/commands/name.html> In this section of the Preferences, you could enter the ChimeraX startup commands directly, e.g.: name positive :arg,lys,his name negative :asp,glu [etc.] .... or you could put all of them in a plain text command file (.cxc file) <https://rbvi.ucsf.edu/chimerax/docs/user/commands/usageconventions.html#cxc-...> ...and in the startup commands open that file: open ~/Desktop/mynames.cxc Either approach would automatically run all the commands at startup. I use the latter approach because it's easier just to edit the file without having to go back into the preferences. Then you can use the predefined names in other commands, e.g. select positive color negative red [etc.] I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Resource for Biocomputing, Visualization, and Informatics Department of Pharmaceutical Chemistry University of California, San Francisco

On Feb 3, 2025, at 2:31 PM, Robert Stanley via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

Hello -

I was wondering what I have to do to install the RspProp tool? It doesn't appear in my utilities menu or the structure analysis one. I have version 1.9 (2024-12-11). I very much appreciate this program and use it in my Biochem and Biophysical Chemistry courses to expose the students to it ASAP.

Thanks, Bob Stanley