Figure 6. Enhancement of hydroperoxide formation by exogenous amines.

(A) Gly-Tyr incubated with ethanolamine without (•) and with (○) SOD. (B) N-Acetyltyrosine incubated with lysine without (•) and with (○) SOD. Experimental conditions were similar to those in Figure 1 with 37 μM hydrogen peroxide generated. Each point represents the mean of duplicate measurements from one experiment, with ranges indicated. Similar results were obtained on two other occasions, and also with Gly-Tyr incubated with lysine or N-acetyltyrosine incubated with ethanolamine.