title: Molecular characterization of MT3 antigens by two-dimensional gel electrophoresis, NH2-terminal amino acid sequence analysis, and southern blot analysis.
abstract: The monoclonal antibody 109d6, which recognizes major histocompatibility antigen MT3-like serologic determinants, has been used to characterize the molecules bearing this determinant in HLA-DR4 and -DR7 homozygous cell lines by two-dimensional gel and sequencing analyses. By these two criteria, these molecules are identical to each other. Southern blot analysis of genomic DNA from HLA-DR1 through -DR7 homozygous cell lines with DR beta-chain gene probes reveals a striking similarity in the pattern of hybridizing fragments between DR4 and DR7 haplotypes and among DR3, DR5, and DRw6 haplotypes reminiscent of the MT3/MT2 allodeterminant distribution. The sharing of the MT2 determinant between DR3, DR5, and DRw6 haplotypes and of the MT3 determinant between DR4 and DR7 haplotypes is part of a broader "homology," which may be a consequence of more recent separation of the haplotypes sharing the MT2 determinant on the one hand and the haplotypes sharing the MT3 determinant on the other hand.
authors.forename: R
authors.initials: R
authors.lastname: Sorrentino
authors.forename: J
authors.initials: J
authors.lastname: Lillie
authors.forename: J L
authors.initials: JL
authors.lastname: Strominger
mesh_terms: D000595:Amino Acid Sequence; D000911:Antibodies, Monoclonal; D002460:Cell Line; D004247:DNA / Q000032:analysis; D004591:Electrophoresis, Polyacrylamide Gel; D000939:Epitopes / Q000032:analysis; D000949:Histocompatibility Antigens Class II / Q000032:analysis* / Q000276:immunology; D006720:Homozygote; D006801:Humans; D009693:Nucleic Acid Hybridization
chemical_list: D000911:Antibodies, Monoclonal; D000939:Epitopes; D000949:Histocompatibility Antigens Class II; D004247:DNA