Figure 3.

Effects of carnosine and GSH as well as GHK on the amounts of spin signal adduct of ·OH generated by the Fenton-type reaction. The radical intensity was defined as the ratio of the peak height of the signal [indicated as arrows in Figure 2Aa] to that of Manganese (Mn). Results are presented as means ± standard errors of the mean (n = 3-8). ^α P < 0.05, ^β P < 0.01 vs. None., ^γ P < 0.01 vs. GSH. ^δ P < 0.05, εP < 0.01 vs. carnosine. ·OH, hydroxyl radicals; GHK, glycyl-ʟ-histidyl-ʟ-lysine; GSH, reduced glutathione.