[The radiosensitivity and direction of differentiation of splenic colony forming cells]

Radiosensitivity of spleen CFU localized in the bone marrow and in the spleen proved to be the same. Do is about 105--120r for the CFU-forming colonies in the spleen and 120--135r for the CFU-forming colonies in the bone marrow. As suggested, there are two CFU fractions in the bone marrow. One of them is radiosensitive and another--radio-resistant. Chiefly the radiosensitive CFU fraction is the one localized in the spleen.