One of the emerging protective functions of P53 is the enhancement of DNA repair.Taura et al. noticed that in addition to P53 down-regulates intracellular ROS levels (thus reducing probability of genetic alterations), the antioxidant function was not expected as P53 was known as a potent pro-oxidant inducing a set of ROS-generating genes, which contribute to apoptosis.However, the anti-oxidant function of P53 is mediated through a set of antioxidant genes, which are responsive to lower levels of P53 in non-stressed or physiologically-stressed cells