CHEM_LINKgroup of categories. Chemical components may be linked together according to component type. Component type is an enumerated list of common polymer linking types defined in category
CHEM_COMP. By defining linking according to type rather than component identifier permits a single specification of generic polymer linkages (i.e. L-peptide linking) between a class of monomer components.
Linkages which span entities are described in the
The geometry of these covalent linkages is also specified in the