Abstract
Summary
1. Mice receiving 950 r can be protected from the 30-day irradiation death by injecting rat bone marrow and caging them individually. 2. Transplantation of rat erythrocytopoietic and granulocytopoietic cells has been demonstrated by the appearance of rat RBC and granulocytes in the circulation. On the 65th day, 100% rat RBC was present in the circulation of all the surviving heterologously protected mice. 3. Rat serum proteins could not be detected in these mice by the serum-agar method.
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