Key points are not available for this paper at this time.
Using the cytotoxic activity of specific isoantisera it was found that free peritoneal macrophages of mouse radiation chimeras are completely replaced by donor-type macrophages about 6 weeks after irradiation and administration of homologous bone marrow. Possible implications regarding the genotype of the fixed reticuloendothelial cells of chimeras are discussed.
H. Balner (Mon,) studied this question.