CD133, a marker for ESCs, HSCs, NSCs, and cancer stem cells, was expressed in 99.9 ± 0.1% of h-UC-SSEA-3(+) cells, a percentage substantially higher than that in h-BM-Muse cells (2.1 ± 0.1%), h-AT-Muse cells (1.4 ± 0.1%), and h-DT-Muse cells (0.4 ± 0.1%; Figs. 1A). The gene discussed is PROM1; the disease is cancer.