Platelet and granulocyte specific allo‐antigens in chimpanzees

Abstract
Chimpanzees were allo-immunized with blood from donors, ChLA-A and -B identical to the recipient. The sera of some of these animals contained antibodies that reacted only with the platelets or granulocytes of the immunizing donor and of some related and unrelated chimpanzees. Both for the platelets and the granulocytes a di-allelic system of allo-antigens is described, provisionally called ChPL-1 and ChGR-1.