title: HLA-DR antigen grouping by use of monoclonal antibody probes: expansion of known groups, and mechanism of cytotoxicity blocking.
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology*; D001666:Binding Sites, Antibody; D001667:Binding, Competitive; D003601:Cytotoxicity Tests, Immunologic; D005455:Fluorescent Antibody Technique; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D006650:Histocompatibility Testing / Q000379:methods*; D006801:Humans
chemical_list: D000911:Antibodies, Monoclonal; D000949:Histocompatibility Antigens Class II