The analysis of the antigenic structure of murine spermatozoa has been hampered by the lack of a convenient objective serological assay. Spermatozoa, in common with other cells, are capable of concentrating 86rubidium. Antibody mediated complement dependent cytotoxicity of murine spermatozoa has been quantitated by measuring release of 86rubidium from pre-labeled spermatozoa. We have used this assay to study the murine T/t locus.
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