Fig. 3. ABTSþ scavenging activity of rice protein hydrolysate fractions. The microbial enzymes used for rice protein digestion were neutral protease from B. subtilis (NP), validase from A. oryzae, and alkaline protease from B. licheniformis. Each rice fraction of different molecular weights (F1, F2, F3, and F4 correspond to samples >10, 3e10, 1e3, or <1 kDa, respectively) was tested in triplicate were the Fe2þ metal chelating activity was expressed as mg EDTA equivalents per gram of dry weight (mg EDTA/g). The data marked by different letters are significantly different (P < 0.05). Texture bar represents the hydrolysate fraction 1 (F1), open bar represents F2, grey bar represents F3, and black bar represents F4.
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