Cytokine erythropoietin EPO

FIGURE 98-3. Proposed differentiation pattern of cells into mature erythrocytes with identification of various immature cell types. In addition, the cells that may be stimulated by the cytokine erythropoietin (EPO) are identified. BM, bone marrow BFU, burst-forming unit CFU, colony-forming unit E, erythroid EB, erythroblast OC, orthochromatophilic PB, peripheral blood PC, polychro-matophilic RBC, red blood cell retie, reticulocyte. 

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