CCNA2 and colorectal carcinoma: Analysis of the expression of key genes involved in the S‐to‐G2 phase transition demonstrated that LETM1 mRNA expression was positively correlated with cyclin A2 and cyclin‐dependent kinase (CDK) 2 in CRC samples (Figure S1A,B), consistent with the analysis of cBioPortal (Figure S1C,D).