Abstract
Cytostatis of the H-2d tumour LSTRA by H-2-restricted effector lymphocytes was inhibited by antisera against H-2.4 and H-2.31 but not by antisera against public specificities or non-H-2 antigens. The unexpected reaction of the same effector cells against Gardner tumour (H-2k) was also shown to be inhibited by a combination of antisera against H-2.4 and H-2.31 but not by each antiserum used separately. The inhibitory capacity of these antisera was removed by absorption with B10.D2 but not with B10 lymphocytes. This indicated the presence of H-2d-like specificities on gardner tumour which could function as self-recognition structures in an H-2Kd and H-2Dd restricted system.
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