title: Human major histocompatibility complex class I antigens: residues 61-83 of the HLA-B7 heavy chain specify an alloreactive site.
abstract: A chemically synthesized peptide (sequence in text) homologous to residues 61-83 of the HLA-B7 heavy chain, induced antibodies that specifically recognized the HLA heavy chain-beta 2-microglobulin complex and the free heavy chain of the HLA-B7 antigen. These antibodies specifically immunoprecipitated the HLA-B7 beta 2-microglobulin complex solubilized from human lymphoblastoid cells by nonionic detergents and reacted with free HLA-B7 heavy chains in blots on nitrocellulose. These observations suggest that the antigenic conformation of this region of the HLA-B7 molecule is independent of the presence of beta 2-microglobulin and that amino acid residues 61-83 mimic an alloreactive site expressed by the HLA-B7 antigen.
mesh_terms: D000595:Amino Acid Sequence; D000920:Antibody-Dependent Cell Cytotoxicity; D002460:Cell Line; D006680:HLA Antigens / Q000032:analysis / Q000276:immunology*; D015235:HLA-B Antigens; D006801:Humans; D007518:Isoantibodies / Q000276:immunology*; D010641:Phenotype; D013329:Structure-Activity Relationship; D001613:beta 2-Microglobulin / Q000276:immunology
chemical_list: D006680:HLA Antigens; D015235:HLA-B Antigens; C037449:HLA-B17 antigen; D007518:Isoantibodies; D001613:beta 2-Microglobulin