Fig. 1. Effect of different combinations of soybean and wheat bran on pH (a), moisture content (b), activity of neutral protease (c),
alkaline protease (d), amylase (e), and reducing sugar content (f) during koji fermentation. The substrate combinations were 40% soybean
(ƻ), 50% soybean (ƶ), 60% soybean (Ƹ).