To exclude the confusion in distinguishing CSCs from non‐CSCs led by different surface markers in cancer cells, Nanog was thus taken as a molecular signature for us to identify CSCs.6, 7, 8 To conveniently identify CSCs from non‐CSCs according to Nanog expression, we conducted a plasmid, pH‐Nanog promoter‐GFP (pH‐NP‐GFP), which expressed GFP under the control of the Nanog promoter (hg38 chr12:7788192‐7789480). Here, NANOG is linked to cancer.