Using PalmGRET, we identified lung‐tropic proteins of EPs derived from lung metastatic hepatocellular carcinoma (HCC) in immunocompetent C3H mice, solute carrier organic anion transporter family member 2A1 (Slco2a1), alanine aminopeptidase (Anpep/Cd13), and chloride intracellular channel 1 (Clic1). The gene discussed is CLIC1; the disease is hepatocellular carcinoma.