[Chimera-users] distance with homotrimer

[Francesco Pietra]

Hello
I am trying to measure (from command line) the distance between
atom NH1 in residue 27, chain M
atom OG1 in residue 215, chain A
command
distance :27 at NH1 :215 at OG1
error: 6 atoms were selected.

The error message is correct because the system is a homotrimer.
My question: any way to specify the chains? Any of my attempts failed.

Thanks for advice (getting distances from the command line would be quicker
that graphically as I have a large number of disnces to measure)
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