the hypothesis that camp or calcium are the second messengers of erythropoietin ( epo ) was tested on fractionated , epo-responsive immature erythroblasts from anemic rabbit bone marrow by examining whether the proliferative effects of the hormone could be mimicked by agents that increase the intracellular concentration of camp or ca2+ .
C0014762
erythroblasts
C0005953
bone marrow