The protein expression of SLC3A2, SLC11A2, SLC1A5, SLC16A1, SLC39A7, SLC39A14 in the lung adenocarcinoma cell line A-549 and H1299 is higher than that in the normal lung epithelial cell line Beas-2B (Fig. 11A–L). The gene discussed is SLC3A2; the disease is lung adenocarcinoma.