Figure 2.

Morphology of colonies derived from sorted CMPs, MEPs, and GMPs. Tibias were sectioned at day 7 after transplantation of (a) no cells, (b) 1 × 10⁴ CMPs, (c) 6 × 10³ MEPs, and (d) 2 × 10⁴ GMPs into lethally irradiated recipients. Controls confirmed the absence of host-derived colonies. Left panels show field views at ×40 magnification, whereas right panels are close-up views at ×100 magnification. Erythroid colonies were generally larger and more compact (left close-up view in b) than were GM colonies (right close-up in b). Also note the distinct nuclear morphologies of granulocytes and monocytes in close-up colony views in b and d.