Journal of Experimental Medicine, Vol 142, 288-298, Copyright © 1975 by Rockefeller University Press
Molecular relationship between private and public H-2 antigens as determined by antigen redistribution method
V Hauptfeld and J Klein
Molecular relationship of public H-2 antigens 1, 5, 6, 8, 11, 13, 25, and
28 to private antigens controlled by K and D regions was studied using the
technique of antibody-induced resistance to complement- mediated
cytotoxicity. The results indicate physical association in the cell
membrane between H-2 antigens 1 and 23 of H-2-a, 8 and 31 of H- 2-d, 11 and
17 of H-2-q, 13 and 30 of H-2-q, 25 and 23 of H-2-k, and 28 and 31 of
H-2-g. These results are in agreement with genetic mapping placing the
determinants of antigens H-2.8, 11 and 25 in the K region , the determinant
of antigen H-2.13 in the D region, and the determinants of antigens H-2.1
and 28 in either the K or the D region. In contrast to genetic mapping
placing the determinant for antigen H-2.6 in the D region, we found that in
the H-2-b haplotype the antigen is associated with K region antigen H-2.33
and H-2.32, and interpreted this result as evidence for two homologous
H-2.5 sites controlled by opposite ends of the H-2 complex. Although the
data do not prove that public antigens are carried by the same molecules as
private ones, they demonstrate a close physical association in the membrane
between the two groups of loci, K and D, coding for the first 33 classical
H-2 antigens (with the exception of antigen H-2.7), and thus support the
two-locus model. The data also support the duplication model of H-2 by
demonstrating two homologous H-2.5 sites associated with K and D molecules.
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