Fig. 6. Erythropoietic reconstitution in lethally irradiated mice. Donor spleen cells from 10-day-old wild-type or TR^0/0 mice were injected into irradiated adult mice. Eleven days after the grafting the adult recipient mice (wild type or TR^0/0) reconstituted with wild-type or TR^0/0 cells, as indicated, were sacrificed and the hematopoietic reconstitution in the spleen was analyzed by examination of spleen paraffin sections after hematoxilin and eosin coloration to show the size of the hematopoietic colonies (colonies are delineated by white dotted lines in A-C), and by examination of cytospin cells after neutral benzidine and MGG staining. Arrows in D and F point to hemoglobin-positive erythroblasts.