Figure 4a showed that, with laser energy at 36 J/cm2, EC50s of SnCe6 in fVII-SnCe6 conjugate were 0.19 μM, 0.30 μM and 0.26 μM for CD133+ CSCs, CD133- non-CSCs and parental H460 cancer cells, respectively. This evidence concerns the gene PROM1 and cancer.