Peroxidase activity.

*<p>The amount of t-BHP reduced was calculated from the amount NADPH oxidized after 6 min. The mixture contained 50 µM GSH, 0.2 mM NADPH, 2 mM EDTA, 0.1 mg/mL BSA, and 6 µg/mL yGR and 1 µM Grx in 100 mM Tris-HCl. Selenite and SAM were added to a final concentration of 5 µM and 4 mM respectively.