2. Materials and methods
2.1. Raw material and pretreatment
Okara (moisture content 79%) was kindly supplied from local market (Gwang-ju, Korea). Okara was lyophilized at −20 °C and stored until further use. Okara was treated using the autoclave equipment for 20 min at 121 °C. The effect of pretreatment was evaluated the amount of sugar release during enzymatic hydrolysis.