Table 2. Effect of SFN and As on the enzymatic antioxidant levels in control and experimental rats. Note: Values are given as the mean ± SD for 8 rats in each group. Values not sharing a common or same letter (^a-d) and they differ significantly at P < 0.05 (Duncan's multiple range test). SOD, 1 unit of enzyme activity was taken as the enzyme reaction, which gave 50% inhibition of nitroblue tetrazolium reduction in 1 min·(mg of protein)−1; CAT, micromoles of H₂O₂ used per minute per milligram of protein; GPX, micromoles of GSH consumed per minute per milligram of protein; GST, micromoles of dichloro-2,4-dinitrobenzene-GSH conjugate formed per minute per milligram of protein; GR, micromoles of NADPH oxidized per minute per milligram of protein; SFN: Sulforaphane, As: Arsenic