Two lung cancer cell lines H1975 and H1373 with medium–low cMet expression and no MET gene amplification (60 000 cMet/cell and 97 000 cMet/cell) are sensitive to TR1801‐ADC, with IC50s of 320 pm (98% maximal killing), with H1975 of 2.2 nm (96%), and with H1373 cancer cell lines in cytotoxicity assays (Table S3). The gene discussed is MET; the disease is lung cancer.