Table 2.

Significance of regression coefficients for degree of hydrolysis (DH) and glutamine (Gln) content.

Source	Sum of Squares		df	Mean Square		F-Value		p-Value/Prob > F
	DH	Gln		DH	Gln	DH	Gln	DH	Gln
Model	42.196	0.905	14	3.014	0.065	57.952	1.790	<0.0001 ****	0.1377 ns
Linear
X1	15.185	0.137	1	15.185	0.137	291.963	3.780	<0.0001 ****	0.0709 ns
X2	0.334	0.001	1	0.334	0.001	6.416	0.026	0.0230 *	0.8741 ns
X3	10.179	0.105	1	10.179	0.105	195.719	2.917	<0.0001 ****	0.1083 ns
X4	3.443	0.175	1	3.443	0.175	66.198	4.849	< 0.0001 ****	0.0437 ns
Quadratic
X12	2.680	0.103	1	2.680	0.103	51.537	2.840	<0.0001 ****	0.1126 ns
X22	3.532	0.010	1	3.532	0.010	67.915	0.264	<0.0001 ****	0.6148 ns
X32	1.098	0.000	1	1.098	0.000	21.118	0.001	0.0004 ***	0.9707 ns
X42	0.529	0.019	1	0.529	0.019	10.168	0.528	0.0061 ***	0.4788 ns
Interaction
X1X2	5.558	0.000	1	5.558	0.000	106.864	0.002	<0.0001 ****	0.9690 ns
X1X3	0.620	0.196	1	0.620	0.196	11.924	5.422	0.0035 **	0.0343 ns
X1X4	0.037	0.045	1	0.037	0.045	0.7125	1.251	0.4119 ns	0.2810 ns
X2X3	0.824	0.000	1	0.824	0.000	15.835	0.008	0.0012 **	0.9278 ns
X2X4	0.135	0.000	1	0.135	0.000	2.597	0.008	0.1279 ns	0.9278 ns
X3X4	0.003	0.101	1	0.003	0.101	0.053	2.792	0.8210 ns	0.1155 ns
Statistic analysis for the model
Residual	0.780		15	0.052	0.036
Lack of Fit	0.605		10	0.061	0.045	1.732	2.491	0.2829 ns	0.1627 ns
Pure Error	0.175		5	0.035	0.018
Cor Total	42.976		29

^*Significant at p < 0.05;

^**Significant at p < 0.01;

^***Significant at p < 0.001;

^****Significant at p < 0.0001;

^ns= not significant.