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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Characterization of cell lines expressing mutant I-Ab and I-Ak molecules allows the definition of distinct serologic epitopes on A alpha and A beta polypeptides.

A series of seven I-Ab-reactive monoclonal antibodies (mAb) has been derived from a BALB/c anti-C57BL/6 immunization. Analysis of the reactivity patterns of these mAb with spleen cells of mice from the independent haplotypes has revealed three groups of mAb: group I mAb react with all haplotypes except d, group II with all except d and k, and group III with all except d, k, and j. In addition, the group I and group II mAb also react with human class II-expressing cells. We have used these mAb to isolate one mutant I-Ab-expressing cell line and three additional I-Ak mutant cell lines. These antibodies have been used, in conjunction with a large panel of I-A-reactive mAb available from others, to extensively characterize our collection of mutant I-A-expressing cell lines. Analysis of the mutant cell lines has allowed us to assign the reactivity of each mAb to either the A alpha- or the A beta-polypeptide. All seven newly isolated mAb appear to react with determinants on the A alpha-polypeptide. Furthermore, analysis of the panel of A alpha k- and A beta k-mutants has allowed us to discriminate at least five epitopes that are separable by mutation on the A beta k-polypeptide, and two epitopes on the A alpha k-polypeptide.[1]


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