title: Serological identification of a new HLA-B7 variant antigen--HLA-B7QUI.
abstract: A new HLA-B antigen, HLA-B7Qui that appears to be a variant of HLA-B7 has been identified. This antigen, which is HLA-Bw6 associated, reacts with approximately two-thirds of cytotoxic antisera stimulated by HLA-B7 or B27 that lack a B27 or B7 component, respectively. All anti-B7 + 27 antisera (stimulated by either B7 or B27) react with B7Qui as do most B22-stimulated sera possessing a B7 component. However, sera stimulated by B60, with or without a B7 component, fail to react with B7Qui. Family studies show the B7Qui allele to be unique to the haplotype-HLA-A32 CW6 B7Qui Bf*S C4A*6 C4B*1 DR11 DQ7 (GLO2). Six Caucasoid subjects on the panel of 6861 HLA-typed potential bone marrow donors have this antigen (phenotype frequency, 0.08745%; gene frequency, 0.04473%). Work undertaken during the 11th International Histocompatibility Workshop (Reekers et al., 1992) showed that B7Qui has the same isoelectric point as HLA-B702 and HLA-B703 (Bpot) and that B7Qui is distinct from the HLA-B7 variants B703, B7SL, BDT, B7 x 40, BRI, and B41v.
authors.affiliation: Regional Tissue Typing Laboratory, National Blood Transfusion Service (Wales), Cardiff, UK.
authors.forename: H
authors.initials: H
authors.lastname: Fussell
authors.forename: M
authors.initials: M
authors.lastname: Thomas
authors.forename: J
authors.initials: J
authors.lastname: Street
authors.forename: C
authors.initials: C
authors.lastname: Darke
mesh_terms: D005260:Female; D014644:Genetic Variation; D015793:HLA-B7 Antigen / Q000032:analysis* / Q000235:genetics / Q000276:immunology; D006801:Humans; D008297:Male; D010375:Pedigree
chemical_list: D015793:HLA-B7 Antigen