Cells expressing all three stem/progenitor cell markers simultaneously (ALL) within Ep-CAM-/low/CD49f + cells did not form more mammospheres or colonies than CD44high/CD24low cells suggesting that CD44high/CD24low phenotype was accurate enough to select for basal progenitors (Figure 2C&2D). The gene discussed is ITGA6; the disease is acute lymphoblastic leukemia.