Table 6 Levels of the independent variables of the FFD to identify the influential factors on L-asparaginase production.

From: Sequencing and characterization of an L-asparaginase gene from a new species of Penicillium section Citrina isolated from Cerrado

Variables

Symbol

Levels

− 1 (%)

0 (%)

+ 1 (%)

L-proline

X1

3.0

4.0

5.0

Peptone

X2

2.0

3.0

4.0

Sucrose

X3

0.2

0.6

1.0

Urea

X4

0.5

1.25

2.0

Ammonium sulfate

X5

0.5

1.25

2.0

Yeast extract

X6

1.5

2.0

2.5

Glucose

X7

0.2

0.6

1.0

L-asparagine

X8

3.0

4.0

5.0

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