PMID: 6407385Jan 1, 1983Paper

A biochemical analysis of the secregation of HLA-DR heavy and light chains in a family studied by two-dimensional gel electrophoresis

Annales d'immunologie
M Roux-DossetoC Goridis

Abstract

Previous studies in our laboratory using primed lymphocyte typing (PLT) in an informative family have led to the identification of four traits and two regions, separable by recombination within the HLA-DR system. In the present study, we analysed the heterogeneity of HLA-DR antigens among members of this family as a first step towards defining the molecular entities responsible for the observed cellular reactivities. Cell lines of various genotypes derived from the members of this family were labelled biosynthetically with 35S-methionine. The total glycoproteins and immunoprecipitates prepared with two monoclonal anti-HLA-DR antibodies, two monoclonal anti-mouse Ia antibodies cross-reactive with HLA-DR, and a rabbit anti-HLA-DR (anti-p27,33) antiserum were fractionated by two-dimensional gel electrophoresis. In agreement with previous results, HLA-DR light chains were clearly polymorphic whereas the heavy chains looked rather monomorphic. The light chain subunits either segregated with one haplotype, or were shared by some but not all haplotypes or were common to all haplotypes. Whereas the haplotype-specific polypeptides correlated best with HLA-DR3 and HLA-DR5 specificities, the shared subunits may have corresponded to the cr...Continue Reading

References

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