title: Erythropoietic progenitors capable of colony formation in culture: state of differentiation.
mesh_terms: D000818:Animals; D001803:Blood Transfusion; D001854:Bone Marrow Cells; D002454:Cell Differentiation; D002455:Cell Division; D002478:Cells, Cultured; D004920:Erythropoiesis; D006410:Hematopoiesis; D007962:Leukocytes; D008264:Macrophages; D051379:Mice; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D013154:Spleen / Q000166:cytology