PROM1 and chronic myelogenous leukemia, BCR-ABL1 positive: The CML G0 cells in Figure 6(a) had low C.E.s and both the CD133 positive and negative fractions produced almost entirely tiny and small erythroid colonies even when stimulated by 7 cytokines, while only the G1/S/G2/M CD133− cells produced a substantial number of colonies, mostly erythroid.