ALDH1A1 and colorectal carcinoma: The transcript shows high activity in the healthy colon (five negative correlations with CYP2B7P1, ADH1C, GGT5, AKRB10, and EPHX2 and two positive correlations with ALDH1A1 and PTGS1), and in CRC, it correlates negatively with DPEP1 and CYP2B7P1 and positively with MAOA (Table 5).