SLC38A7 and colon adenocarcinoma: To determine the amino acid transporter expression profile in colon adenocarcinoma (COAD), we used the publicly available web tool UALCAN (website: http://ualcan.path.uab.edu/index.html) [28] with The Cancer Genome Atlas (TCGA) database to analyze the expression of common amino acid transporters (including SLC6A14, SLC3 and SLC7 families) in CRC and normal colonic tissue samples.