PMID: 6163817May 1, 1981Paper

Spatially distinct allodeterminants of the H-2Kk molecule as detected by monoclonal anti-H-2 antibodies

The Journal of Immunology : Official Journal of the American Association of Immunologists
K OzatoD H Sachs

Abstract

In an attempt to delineate spatial relationships between various allodeterminants of cell surface MHC antigens, competitive binding studies were performed using 4 different monoclonal antibodies, each of which reacted with the H-2Kk antigen but with different serologic specificities. Competition was studied by examining the effect of unlabeled antibodies on the binding of each 125I-labeled antibody to spleen cells of the H-2a haplotype. Mutual inhibition was observed between 2 of the antibodies, and a 3rd antibody of lower affinity was inhibited by the first 2 antibodies but did not itself inhibit the binding of these antibodies. The 4th antibody did not block the binding of the other 3 labeled antibodies, and binding of this 4th labeled antibody was only partially inhibitable by the other 3 antibodies. These results indicate the presence of at least 2 spatially distinct allodeterminants on H-2Kk molecules expressed on the cell surface.

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