Optimizing Culture Conditions by Statistical Approach to Enhance Production of Pectinase from Bacillus sp. Y1

Table 2

Factors and levels in the fractional factorial design.

Factors	Level of factors (g/L)
	–1	0	+1
Carbon source (x1)	50.0	70.0	90.0
(NH4)2SO4 (x2)	3.0	8.0	13.0
K2HPO4 (x3)	0.0	0.5	1.0
MgSO4 (x4)	1.0	2.0	3.0
Tween-80 (x5)	1.0	2.0	3.0
Initial pH (x6)	7.5	8.5	9.5