Optimization of Fermentation Conditions and Media for Production of Glucose Isomerase from Bacillus megaterium Using Response Surface Methodology

Table 3

Variables and their coded levels used for optimization of glucose isomerase production by B. megaterium.

Factors		Code levels
Symbols	Variables	Low (−1)	Central (0)	High (+1)
X1	D-xylose concentration (%)	0.5	1	1.5
X4	Yeast extract concentration (%)	0.75	1	1.25
X8	Cultivation temperature (°C)	35	37	39