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Table 1 The levels of the independent variables through CCD

From: Optimization of medium compositions to improve a novel glycoprotein production by Streptomyces kanasenisi ZX01

Factors

Variables

Levels

−1.682

−1

0

1

1.682

Soluble starch (g/L)

X 1

5.0

7.0

10.0

13.0

15.0

Yeast extract (g/L)

X 2

1.3

2.0

3.0

4.0

4.7

Inorganic salts (g/L)

X 3

1.0

1.7

2.7

3.7

4.4

  1. x i = coded value of the variable X i
  2. x 1 = (soluble starch-10)/3; x 2 = (yeast extract-3)/1; x 3 = (inorganic salts-2.7)/1
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