when erythropoiesis is induced in the long-term cultures by addition of anemic mouse serum before infection by polycythemia-inducing friend virus , the generation of erythropoietin-independent cfu-e and erythrocyte formation is followed by the sustained production ( greater than 40 wk ) of primitive erythroid cells with low spontaneous levels ( less than 5 % ) of hemoglobinization .
C0014819
erythropoiesis
C0014792
erythrocyte