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Table 1 The levels of independent variables in the Plackett-Burman Design for the complex and defined media

From: Assessing medium constituents for optimal heterologous production of anhydromevalonolactone in recombinant Aspergillus oryzae

Varible

Components

Levels of variable

−1 (Low)

0 (Central)

+1 (High)

 

Complex medium

   

A

Sucrose (g/L)

20

40

60

B

NaNO3 (g/L)

1

3

5

C

Yeast extract (g/L)

0

2

4

D

KH2PO4 (g/L)

0

1

2

E

K2HPO4 (g/L)

1

3

5

F

KCl (g/L)

0.5

0.75

1

G

MgSO4.7H2O (g/L)

0.5

0.75

1

H

Trace elements (mL/L)

0.5

0.75

1

 

Defined medium

   

I

Sucrose (g/L)

40

70

100

J

NaNO3 (g/L)

3

5

7

K

K2HPO4 (g/L)

3

5

7

L

KH2PO4 (g/L)

0

1

2

M

KCl (g/L)

0.25

0.50

0.75

N

MgSO4.7H2O (g/L)

0.25

0.50

0.75

O

CaCl2.2H2O (g/L)

0

0.10

0.20

P

Na3C6H5O7.2H2O (g/L)

0

1

2

Q

Biotin (mL/L)

0

0.10

0.20

R

Trace elements (mL/L)

0.25

0.50

0.75