has_component has component has component has_constituent_monomer A relation that holds between a polymer and its constituent monomers. P has_constituent_monomer c if and only if P has_component multiple instances of c and each instance of c is covalently attached to another instance of c. The constituent monomers need not be covalently attached in an end-to-end manner; that is, polymers with internal connections (e.g., polyubiquitin) can use this relation, as can circular polymers (e.g., plasmids) and multi-branched polymers (e.g., glycans). This relation, as non-transitive, allows one to indicate the number of instances of c. false has_constituent_monomer protein