[Chimera-users] Selecting residues from one chain

Elaine Meng meng at cgl.ucsf.edu
Thu Dec 9 13:38:25 PST 2021

That sounds like an error message for ChimeraX, not Chimera.  So first, you need to be sure about which program you are using!!   (also there is a different mailing list for ChimeraX, chimerax-users at cgl.ucsf.edu if you are interested in that in the future)

In Chimera, 
Your command would select residues 99,100,118-130,136,161,163 in ALL chains, and 164 in chain B.  If you were using Chimera and wanted to select all those residues in chain B only, you would need command:

select 99.B,100,B,118-130.B,136.B,161.B,163.B,164.B

or you could select those residue numbers in all chains and then deselect the ones that are not chain B, e.g.

select 99,100,118-130,136,161,163,164
~sel ~:.B

Help for atom specification in Chimera:

In ChimeraX, 
we have improved command-line specification, and to select those residues in just chain B it would be command:

select /B:99,100,118-130,136,161,163,164

Help for atom specification in ChimeraX:

I hope this helps,
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Dec 9, 2021, at 1:22 PM, Joao M.C. Teixeira via Chimera-users <chimera-users at cgl.ucsf.edu> wrote:
> Sorry for my previous email, it was sent too fast...
> I am trying to select residues from a chain, and I am trying this command: select :99,100,118-130,136,161,163,164.B
> What is wrong? I am getting: Expected an objects specifier or a keyword
> Thank you,

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