The following table gives some useful examples of RasMol atom expressions.
Expression Interpretation * All atoms cys Atoms in cysteines hoh Atoms in heterogenous water molecules as? Atoms in either asparagine or aspartic acid *120 Atoms at residue 120 of all chains *p Atoms in chain P *.n? Nitrogen atoms cys.sg Sulphur atoms in cysteine residues ser70.c? Carbon atoms in serine-70 hem*p.fe Iron atoms in the Heme groups of chain P