Appearance of erythroid and erythrocyte-containing mixed hematopoietic colonies.

Erythroid and erythrocyte-containing mixed hematopoietic colonies (original magnification, × 400 and × 100, respectively. (A) From E12.5 FL cells of EPOR^−/−hGMR^+/−embryos induced by hGM-CSF, and EPOR^+/+hGMR^+/−embryos induced by hGM-CSF or EPO. (B) From E8.0 YS cells of EPOR^+/+hGMR^+/− embryo induced by hGM-CSF or EPO.