Table 1. The hydrolysis conditions for the preparation of protein hydrolysates from Chinese pond turtle muscle.

Hydrolysis condition	Protease
	Alcalase	Flavourzyme	Trypsin	Bromelain
Incubation temperature/°C	55	50	60	55
pH	8.0	7.5	8.0	7.0
(m(enzyme)/m(substrate))/%	1, 2, 3, 4, 5	1, 2, 3, 4, 5	1, 2, 3, 4, 5	1, 2, 3, 4, 5
(m(solid)/V(liquid))/(g/mL)	1:1	1:1	1:1	1:1
t(incubation)/h	1, 3, 5, 7	1, 3, 5, 7	1, 3, 5, 7	1, 3, 5, 7
Inactivation temperature/°C	90	90	90	90
t(inactivation)/min	20	20	20	20