Also, the nonmalignant mesothelial cells tendedto express higher levels of both SLC4A1 and SLC26A1 than mesothelioma.To confirm the expression of SLC4A1 and SLC26A1 on the protein level,MeT-5A (mesothelial), P31 (mesothelioma), BEAS-2B (lung epithelial),and A549 (lung cancer) cells were further investigated by immunoblotting(Figure 4c). The gene discussed is SLC4A1; the disease is lung cancer.