title: Characterization and developmental expression of the chicken B-G heterodimer.
abstract: Monoclonal antibody R7-3 recognized an erythroid specific cell surface molecule with a m.w. of approximately 98 kilodaltons (Kd) under nonreducing conditions and molecules of 40 and 44 Kd under reducing conditions on both embryonic- and adult-derived peripheral RBC. Immunochemical characterization, including limited peptide map analyses of these molecules, provided evidence that mAb R7-3 was recognizing the MHC coded B-G heterodimer. This is the first report of a monoclonal antibody that recognizes the B-G heterodimer. Affinity binding studies suggested that mAb R7-3 preferentially recognized the 44 Kd molecule. Immune depletion analyses demonstrated the presence of a single population of B-G heterodimers. Endoglycosidase-F and neuraminidase digestions suggested that the 44 and 40 Kd molecules contained very little, if any, carbohydrate. B-G heterodimer expression was examined on primitive and definitive RBC during embryonic development. B-G heterodimer expression was not detected on RBC of other avians.
authors.affiliation: Department of Zoology, University of Texas, Austin.
authors.forename: T J
authors.initials: TJ
authors.lastname: Morgan
authors.forename: H S
authors.initials: HS
authors.lastname: Lillehoj
authors.forename: B G
authors.initials: BG
authors.lastname: Sanders
authors.forename: K
authors.initials: K
authors.lastname: Kline
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D002642:Chick Embryo / Q000276:immunology; D002645:Chickens / Q000097:blood / Q000276:immunology*; D004912:Erythrocytes / Q000276:immunology; D006031:Glycosylation; D006649:Histocompatibility Antigens / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D010449:Peptide Mapping
chemical_list: D000911:Antibodies, Monoclonal; D006649:Histocompatibility Antigens