Fig. 2

Plasma sulfhydryl groups concentrations (SH, mean ± SE). *Effect of aging, ^†effect of l-2-oxothiazolidine-4-carboxylate treatment, ^‡effect of heat exposure, ^§effect of l-2-oxothiazolidine-4-carboxylate treatment in heat-exposed rats, ^!effect of l-2-oxothiazolidine-4-carboxylate treatment and heat exposure. ^†,§ p < 0.05, **^,‡‡,!! p < 0.001