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. 1987 Jun 15;138(12):4472-9.

Different VL and VH germ-line genes are used to produce similar combining sites with specificity for alpha(1----6)dextrans

P N Akolkar, S K Sikder, S B Bhattacharya, J Liao, F Gruezo, S L Morrison, E A Kabat
  • PMID: 2438345

Different VL and VH germ-line genes are used to produce similar combining sites with specificity for alpha(1----6)dextrans

P N Akolkar et al. J Immunol. .

Erratum in

  • J Immunol 1987 Dec 1;139(11):3911

Abstract

Monoclonal antibodies to alpha(1----6)dextrans produced in mice immunized with the T-independent antigens alpha(1----6)dextran or the stearylisomaltosyl oligosaccharides have been characterized immunochemically. To correlate the immunochemical properties of these monoclonal antibodies with their primary structure, we have sequenced the variable (V) regions of the light (L) and heavy (H) chains. Three V kappa germ-line genes belonging to two major gene families were used; differential J usages also contribute to diversity. Five different VH germ-line genes belonging to three major VH families were used. The VH genes were further modified by junctional diversity and differential J usage and possibly by somatic mutations. The effects of these modifications on the fine specificities of anti-alpha(1----6)dextrans are discussed. Thus far, six different combinations of VLJL-VH(D)JH chains that form groove-type combining sites specific for alpha(1----6)dextran have been found. We conclude that entirely different VL and VH can form combining sites specific for the internal linear sequence of alpha(1----6)dextran.

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