title: A monoclonal antibody which detects a polymorphic Ia antigenic determinant reacts with purified beta polypeptide chain.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D004591:Electrophoresis, Polyacrylamide Gel; D000939:Epitopes; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D011498:Protein Precursors / Q000276:immunology*; D051381:Rats
chemical_list: D000911:Antibodies, Monoclonal; D000939:Epitopes; D000949:Histocompatibility Antigens Class II; D011498:Protein Precursors