title: Identification with the monoclonal antibody 26.163 of a determinant shared by the beta chains of the gene products of the HLA-DR, DQ, and DP loci.
abstract: Immunochemical studies (sequential immunoprecipitation followed by SDS-PAGE and two-dimensional gel electrophoresis) have shown that the monoclonal antibody (MoAb) 26.163 reacts with HLA-DR, DQ, and DP antigens. Testing with isolated alpha and beta chains of HLA class II antigens and immunoblot analysis also demonstrated that the determinant defined by the MoAb 26.163 is localized on beta chains and does not require their association with alpha chains for its expression. The MoAb 26.163 appears to be the first example of a monoclonal antibody with specificity for the gene products of HLA-DR, DQ, and DP loci.
mesh_terms: D000911:Antibodies, Monoclonal / Q000145:classification; D002874:Chromosome Mapping; D003101:Collodion; D004591:Electrophoresis, Polyacrylamide Gel; D000939:Epitopes / Q000032:analysis* / Q000235:genetics; D006681:HLA-D Antigens / Q000235:genetics*; D006682:HLA-DP Antigens / Q000235:genetics*; D006683:HLA-DQ Antigens / Q000235:genetics*; D006684:HLA-DR Antigens / Q000235:genetics*; D006801:Humans; D007137:Immunoglobulin alpha-Chains / Q000235:genetics; D010209:Paper; D011233:Precipitin Tests / Q000379:methods
chemical_list: D000911:Antibodies, Monoclonal; D000939:Epitopes; D006681:HLA-D Antigens; D006682:HLA-DP Antigens; D006683:HLA-DQ Antigens; D006684:HLA-DR Antigens; D007137:Immunoglobulin alpha-Chains; D003101:Collodion