Whole cell extracts were prepared from the uteri of ovariectomized female mice that had been treated with oil or E2 and subjected to quantitative Western blot analysis. The levels of (A) SOD1 (*, p<0.05), (B) Ape1 (**, p<0.01), and (C) PDI (*, p<0.05) protein were significantly different in oil- and E2-treated mice. Expression of each protein was normalized to the amount of GAPDH present. Six mice were included in the oil- and E2-treated groups as indicated at the base of each treatment group bar.