SALL2 and cancer: Since transcription factors can be master regulators of stem cell activity in various cancers,[3, 4, 5] we searched for CDKAL1‐dependent mRNAs containing CESs assigned to the GO term “transcription regulator activity.” We found SALL2 mRNA at the top of the gene list whose 5’UTR best correlated with the CES we identified (Figure 4H).