SOD2 and neoplasm: To further characterize the link between MnSOD-Ac and its function, TS versus tumor promoter, pMEFs were co-infected with oncogenic lenti-KrasG12V (i.e., the oncogenic Kras gene) and lenti-MnSODWT, lenti-MnSODK68R, or lenti-MnSODK68Q.