H-2 Antigen variants in a cultured heterozygous mouse leukemia cell line

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Abstract
H-2 antigen variants, derived from a heterozygous mouse Friend leukemia cell line by selection with anti-H-2 antisera and complement, were tested for susceptibility to cell-mediated cytolysis, using T-lymphocytes directed against individual H-2 antigens. The cytotoxic cells were generated in the BALB and B10 backgrounds by a combination of in vivo and in vitro immunizations. The phenotypes of the variants inferred from the patterns of resistance or susceptibility to CML were consistent with those presumed from earlier assays using antisera. The one exception was the variant cell line which was H-2Dd− in assays using antisera, but was H-2Dd+ by CML.