Fig. 1.

Lifespans of male transgenic mice overexpressing various antioxidant enzymes. Survival studies were conducted as described by Ran et al. (2007), and all mice were on the C57BL/6J background. The mice were housed four animals per cage starting at 2 months of age and fed a commercial mouse chow (Teklad Diet LM485) ad libitum. The survival of the WT cohort is presented in each of the graphs. The number of animals and the survival data are given in Table 1.