Thanks, Eric Steve

On Jul 28, 2026, at 11:59 AM, Eric Pettersen <pett@cgl.ucsf.edu> wrote:

Hi Steve, You might want to review the documentation on atom specification <https://www.cgl.ucsf.edu/chimerax/docs/user/commands/atomspec.html>, but briefly: what follows an '@' sign has to be the atom name. If you want to use the atom's element type or IDATM type, you don't precede it with '@', so:

sel H Selects all hydrogens (element H) del Fe Deletes all irons (element Fe) hide HC Hides all hydrogens bonded to carbon (IDATM type HC)

--Eric

Eric Pettersen UCSF Computer Graphics Lab

...

On Jul 28, 2026, at 4:58 AM, Steven Brawer via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

Newbie:

I ran

open 2zcp delete /B delete solvent

hide cartoons show atoms

addh #1 hbond false ----------- lots of H atoms, colored white by default

color @HC pink ------ NOTHING HAPPENS hide @HC --------- NOTHING HAPPENS hide #1 @HC --------- NOTHING HAPPENS select @HC --------- NOTHING HAPPENS select #1 @HC --------- NOTHING HAPPENS

delete #1 @H ------ does not work either.

How can I hide or delete the hydrogens?

My understanding (from the documentation) is that HC denotes hydrogens bonded to carbons, H denotes hydrogens bonded to N or O (as appropriate)

The following DOES work (sanity check) select C3 delete sel

Thanks

Steve _______________________________________________ ChimeraX-users mailing list -- chimerax-users@cgl.ucsf.edu To unsubscribe send an email to chimerax-users-leave@cgl.ucsf.edu Archives: https://mail.cgl.ucsf.edu/mailman/archives/list/chimerax-users@cgl.ucsf.edu/