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  • Title: An unusual "morphologic" variant of BF S.
    Author: Raum D, Surgenor T, Awdeh Z, Marcus D, Blumenthal M, Yunis EJ, Alper CA.
    Journal: Am J Hum Genet; 1984 Mar; 36(2):346-51. PubMed ID: 6585138.
    Abstract:
    In the course of family studies of haplotypes of the alleles of the sixth chromosome loci HLA-A, C, B, D/DR, BF, C2, C4A, C4B, and glyoxalase I, we encountered an unusual BF variant. Its mobility was similar to BF F but it appeared to have a lesser intensity after straining with Coomassie Blue, and it was demonstrated by crossed immunoelectrophoresis to be present in lower concentration. It was therefore designated BF FQL. This variant was found on the haplotype HLA-A1, B17, DR7, BF*FQL, C2*C, C4A*6, C4B*1, GLO2. All other haplotypes of this type so far identified carry the BF variant BF S. Following activation of serum samples with zymosan, BF was analyzed by both agarose electrophoresis and isoelectric focusing and immunofixation. On both treatments, serum with BF SFQL produced a Ba pattern identical to that of a sample which was BF S. The Bb pattern for F and S are similar but differ from those of the rare variants BF F1 and BF S1. The Bb pattern of BF FQL was, thus, as expected, the same as BF F or BF S. Hence, we conclude that the variant is a mutant from BF S with mobility similar to BF F. The mutation seemed also to have resulted in a lower concentration of product than normal.
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