Cystine Set

This set contains the atoms of cysteine residues that form part of a disulphide bridge, i.e. half cystines. RasMol automatically determines disulphide bridges, if neither the predefined set cystine nor the RasMol ssbonds command have been used since the molecule was loaded. The set of free cysteines may be determined using the RasMol atom expression "cys and not cystine"