Table 1. Extraction condition of different extraction methods

Extraction method	Extraction temperature (℃)	Extraction pH
Water extraction	45	7.0
KOH hydrolysis	45	6.0
Papain hydrolysis	60	8.0
Alcalase hydrolysis	40	10.0
Neutrasee hydrolysis	45	7.5
Flavourzyme hydrolysis	53	6.5

KOH, potassium hydroxide.