SLCO2A1 and hepatocellular carcinoma: 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).