A 99-aa micropeptide named KRASIM encoded by lncRNA NCBP2-AS2, discovered through ribosome profiling and notably differently expressed in normal hepatocytes and hepatocellular carcinoma (HCC) cells, has been shown to interact with KRAS and inhibit ERK signaling in HCC cells. The gene discussed is NCBP2; the disease is hepatocellular carcinoma.