Independent variables and CCD coded levels for the hydrolysis of DORB protein.

Independent variables	Code levels
	−1.68	−1	0	1	1.68
X 1: temperature (°C)	41.59	45.00	50.00	55.00	58.41
X 2: E/S (% w/v)	0.50	0.90	1.50	2.10	2.50
X 3: hydrolysis time (min)	79.09	120.00	180.00	240.00	280.91