Afterwords, the only way I found to solve indirectly the problem was with command

select @#/serialNumber=48727

which pointed to residue 3687.W with segname WT2

I hope there is a quicker way
fp



---------- Forwarded message ---------
From: Francesco Pietra <chiendarret@gmail.com>
Date: Sun, Nov 15, 2020 at 11:03 AM
Subject: zone & segname
To: chimera <chimera-users@cgl.ucsf.edu>


Hello
Working with charmm36, therefore with the great aid of segname for my homotrimer, when commanding

sel :27.M z<3

I get also a water molecule, with O-atom Tip3 3687.W OH2

Is there any way to extend the above command in order to have the segname associated with this water residue? This is because there are eight 3687.W residues with different segnames.

I tried to solve indirectly the problem with

sel :3687.W@/pdbSegment=WT#

where # ranges from 1 to 8 (i.e., the same residue name for segname WT1 to WT8). Contrary to my expectations, it does not work
The same with sel :3687@/pdbSegment=WT#

Thanks for advice
francesco pietra