[Chimera-users] Select density of particular sidechains

[Elaine Meng]

Hi Yangqi,
To show the density near some atoms, use the zone option in Volume Viewer. Choose "Features… Zone" from the Volume Viewer menu to show the zone options in the dialog, and then with the atoms selected, click Zone to apply the chosen radius value.
<http://www.rbvi.ucsf.edu/chimera/docs/ContributedSoftware/volumeviewer/volumeviewer.html#zone>

Or, you can do the same thing with the “sop zone” command, maybe something like:

sop zone #1 #0:2  3 

There are other possible options, see:
<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/sop.html#zone>

The reason you couldn’t do it with “zonesel" is that you can’t select only part of the map; it always selects the whole thing.
I hope this helps,
Elaine
-----
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco


> On Jan 7, 2019, at 6:40 PM, BuddySphinx <yangqi.gu at yale.edu> wrote:
> 
> Dear Chimera users,
> I have an EM map and pdb coordinates. I am trying to show density fit of some of my sidechain. I want to display a particular sidechain fitting into the density. I was trying to use zonesel feature:
> zonesel #0 (reference pdb):2 (residue #2) 3 (cutoff 3A) #1 (EM map)
> show sel
> But somehow it did not show the EM density of residue #2, rather the entire map. I am wondering what I did wrong?
> Best,
> Yangqi
>