Another study of genomic, transcriptomic, and proteomic data from KRAS-mutated lung adenocarcinoma (27) identified three biological subgroups: STK11/LKB1 (KL subtype), TP53 (KP subtype), and CDKN2A/B (KC subtype). The gene discussed is CDKN2A; the disease is lung adenocarcinoma.