Hi there,

I want to measure the distance and angle between an aromatic ring (phenylalanin and a residue backbone) like this: http://www.pymolwiki.org/index.php/File:Pseu1.png

I learned from here that I need to make a pseudoatom but I cannot make it work.

I tried
pseudoatom test, resi=100, color=tv_blue, n. cg+cd1+ce1+cz+ce2+cd2

and some other ways! I don't know how should I choose the write atoms and make the pseudoatom. After this probably distance and angle measurement would be straightforward.

Best regards