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INCIDENCE OF A WEAK HL‐A W27 ANTIGEN IN A CZECH FAMILY

In two members of a Czech family a weak W 27 antigen was found. The lymphocytes of the two individuals showed an identical positive cytotoxic reaction only with some sera having anti‐W 27 specificity; anti‐W 27 of both the said sera and those showing negative cytotoxic test was absorbed by the lymphocytes. The thrombocyte absorption capacity was substantially poorer.