Figure 2: Quantitative analysis of antioxidant activity of ME. DPPH assay was performed on the extract of band A (ME-band A) from TLC. Vitamin C was used as a positive control for comparison. Antioxidant activities (% scavenging) of both ME and vitamin C, calculated as described in Materials and Methods, were dose-dependent. The IC50 values of ME and vitamin C were 16.03 1.44 g/mL and 5.16 0.92 g/mL, respectively. Error bars represent SEM.