File Name : figure s1.tif Caption : figure s1. effects of sod inhibitor ddc (a), cat inhibitor 3-at (b), gsh-px inhibitor msa (c), gr inhibitor bcnu (d) or gsh synthesis inhibitor bso (e and f) on the activities of corresponding antioxidant enzyme and gsh content as well as gsh/gssg ratio in the presence of gen. different lowercase letters at the top of each bar denote significant differences among groups (one-way anova with tukey’s post hoc test, p < 0.05).