IGROV1 (p53wt) and SKOV3ip (p53del) cells were stained with fluorescent-labeled antibodies and three different cancer cell populations (double-positive: L1CAM+/CD133+, L1CAM+/CD133−, double-negative: L1CAM−/CD133−) were isolated by fluorescence-activated cell sorting (FACS) (Figure 1A). Here, PROM1 is linked to cancer.