Dear all, I am attempting to add a bond restraint that connects a serine in one molecule to a carbon located in its symmetry mate in the adjacent unit cell.

Atom selection 1: chain 'A' and resid ' 230 ' and name ' C ' and altloc 'A'

Atom selection 2: chain 'A' and resid ' 179 ' and name ' OG ' and altloc 'A' and (*insert symmetry keyword here*) 'x-1,y,z'

(altloc B in both cases is not covalently attached)

I cannot seem to find a complete description of the atom selection syntax in the Phenix documentation to specify which symmetry mate. and the gui/ phenix graphics does not have any way to generate symmetry mates.

What is the keyword that specifies a symmetry mate?

Thanks,

Dave Lodowski