We selected four cancer cell lines that are sensitive to these agents19 and harbor diverse oncogenic drivers20: H23 (lung; KRAS-G12C), PC9 (lung; EGFR amplification and exon19 deletion), HT-29 (colon; BRAF V600E) and MHH-ES-1 (Ewing sarcoma; EWS-FLI1 fusion). The gene discussed is KRAS; the disease is Ewing sarcoma.