VMD User's Guide

Keyword Arg Descriptionhetero bool “not (protein or nucleic)”hydrogen bool name ”[0-9]?H.*”large bool “protein and not (small or medium)”medium bool residues named VAL THR ASP ASN PRO CYSASX PCA HYPneutral bool residues named VAL PHE GLN TYR HIS CYSMET TRP ASX GLX PCA HYPpolar bool “protein and not hydrophobic”purine bool residues named ADE A GUA Gpyrimidine bool residues named CYT C THY T URI Usmall bool residues named ALA GLY SERsurface bool “protein and not buried”rasmol str translates Rasmol selection string to VMDalpha helix bool atom’s residue is in an alpha helixpi helix bool atom’s residue is in a pi helixhelix 3 10 bool atom’s residue is in a 3-10 helixhelix bool atom’s residue is in an alpha or pi or 3-10 helixextended beta bool atom’s residue is a beta sheetbridge beta bool atom’s residue is a beta sheetsheet bool atom’s residue is a beta sheetturn bool atom’s residue is in a turn conformationcoil bool atom’s residue is in a coil conformationstructure str single letter name for the secondary structurephi, psi float backbone conformational angleswithin str selects atoms within a specified distance ofa selection (i.e within 5 of name FE).exwithin str exclusive within, equivalent to (within 3 of X) and not X.same str selects atoms which have the same keyword asthe atoms in a given selection (i.e. same segname as resid 35)ufx, ufy, ufz num force to apply in the x, y, or z coordinatesTable 5.6: Atom selection keywords (continued).78