Table 1. Model Regression Coefficients Estimated by Multiple Linear Regressions for the degree of hydrolysis (DH), DPPH radical-scavenging activity (DPPH) and ABTS radical-scavenging activity (ABTS) of MMPHs.^a.

Factor	Coefficient
	DH	DPPH	ABTS
constant	8.401*	−2.967*	0.238*
linear
X1	3.305*	8.468*	9.255*
X2	2.318*	3.429*	1.418*
quadratic
$X_1^2$	−0.0986*	−0.254*	−0.310*
$X_2^2$	−0.0654*	−0.0951*	−0.00296*
interactions
X1 × X2	−0.0256*	−0.3070*	0.0007961*
R2	0.818	0.925	0.969

Notes.

^aA model in which x₁ =  enzyme concentration, x₂ =  hydrolysis time.

^*Significant at p < 0.05.