Term Name:	polypeptide_domain
Synonyms:	ca_bind, DNA_bind, domain, np_bind, polypeptide domain, polypeptide_structural_domain, structural domain
Definition:	A structurally or functionally defined protein region. In proteins with multiple domains, the combination of the domains determines the function of the protein. A region which has been shown to recur throughout evolution.
Ontology:	Sequence Ontology [SO:0000417]