title: Functional sites on Ia molecules.
mesh_terms: D000818:Animals; D005785:Gene Conversion; D000949:Histocompatibility Antigens Class II / Q000502:physiology*; D006801:Humans; D046911:Macromolecular Substances; D051379:Mice
chemical_list: D000949:Histocompatibility Antigens Class II; D046911:Macromolecular Substances