Morphological properties of BAF-B03–derived cells. BAF-B03 (A), BER2 (B), BC (C), and BM (D) cells were cultured in the presence of IL-3, whereas BMC (E), BEMC (F) , BEME (G), and BEMD3 (H) cells were cultured in the absence of IL-3. The addition of IL-3 does not alter the cell cluster-forming properties of BMC, BEMC, BEME, and BEMD3 cells.