CD34 and chronic myelogenous leukemia, BCR-ABL1 positive: Figure 4 summarizes a number of representative experiments comparing the total cloning efficiencies (C.E.s) of CD34+ G0 and G1/S/G2M cells from normal bone marrow, normal mobilized peripheral blood, pooled cord blood samples, and chronic phase CML peripheral blood samples. In all except some of the cord blood samples, the G0 cells had higher total C.E.s and almost always also produced larger GM and erythroid colonies (not shown) than the G1/S/G2/M cells (Figure 4(a)), providing additional evidence that they are more primitive.