Thanks a lot Eric for the help :-) On Mon, Nov 7, 2022 at 10:45 PM Eric Pettersen <pett@cgl.ucsf.edu> wrote:

Hi Prathvi, Assuming that 'm' is your protein model, then the code would be:

from ChemGroup import findGroup disulfides = findGroup("disulfide", [m]) num_disulfides = len(disulfides)

--Eric

Eric Pettersen UCSF Computer Graphics Lab

On Nov 7, 2022, at 12:32 AM, Prathvi Singh via Chimera-users < chimera-users@cgl.ucsf.edu> wrote:

Hi Elaine,

I have found out a way to select the disulphide bonded CYS residues in UCSF chimera using the command: *select disulphide*.

However, is there a way to count the number of disulphide bridges in a protein and save in a variable?

-- Prathvi Singh, Research Fellow, Department of Biological Sciences & Bioengineering, Indian Institute of Technology, Kanpur-208016 _______________________________________________ Chimera-users mailing list: Chimera-users@cgl.ucsf.edu Manage subscription: https://www.rbvi.ucsf.edu/mailman/listinfo/chimera-users

-- Prathvi Singh, Research Fellow, Department of Biological Sciences & Bioengineering, Indian Institute of Technology, Kanpur-208016