We focused on the amino acid transporters SLC1A5, SLC6A14, SLC7A6, SLC38A1, SLC38A2, SLC38A3, and SLC38A5 by investigating their transcriptional expression profiles in HCC, their role in cellular glutamine transport function, as well as their clinical significance in HCC patients. The gene discussed is SLC7A6; the disease is hepatocellular carcinoma.