Point mutation, allelic loss and increased methylation of c‐Ha‐Ras gene in human hepatocellular carcinoma
Norio Ogata, Tomoteru Kamimura, Hitoshi Asakura – 1 January 1991 – Somatic alterations of the c‐Ha‐ras gene were examined in 21 Japanese patients with hepatocellular carcinoma. Restriction endonuclease analysis by double digestion with MspI and HpaII revealed that DNAs from two of 21 hepatocellular carcinoma tissues were affected by nucleotide substitution at the twelfth amino acid coding sequence of the c‐Ha‐ras gene.