2.1. Materials
Peanut seeds were purchased from the local market (Zhengzhou, China) and stored at 4 °C until their use. The seeds were composed of (g/100 g dry matter) 46.84% oil, 24.44% protein, 4.65% crude fiber, 4.63% water, and 2.35% ash. Viscozyme® L (complex plant hydrolase; 5086 U/mL; the main ingredients are cellulase, hemicellulose, and arabinose) was purchased from Novozymes (Novo, China). All other reagents used were of analytical grade.