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Table 4 The influence of headspace to the control strain Cac-CON and the overexpressing NADH oxidase strain Cac-NOX

From: A water-forming NADH oxidase regulates metabolism in anaerobic fermentation

Products (g/L)

Headspace

Cac-CON

Cac-NOX

75 %

50 %

25 %

0 %

75 %

50 %

25 %

0 %

Acetone

5.12 ± 0.26

4.47 ± 0.22

5.08 ± 0.25

4.56 ± 0.23

4.90 ± 0.24

4.18 ± 0.21

2.99 ± 0.15

1.31 ± 0.07

Ethanol

2.07 ± 0.10

1.98 ± 0.10

2.11 ± 0.11

1.83 ± 0.09

0.77 ± 0.04

0.95 ± 0.05

0.48 ± 0.02

0.24 ± 0.01

Butanol

12.15 ± 0.61

11.96 ± 0.60

12.17 ± 0.61

11.78 ± 0.59

8.79 ± 0.44

8.37 ± 0.42

5.84 ± 0.29

3.29 ± 0.16

Acetic acid

0.84 ± 0.04

0.45 ± 0.02

0.52 ± 0.03

1.78 ± 0.09

1.56 ± 0.08

3.37 ± 0.17

1.91 ± 0.10

2.50 ± 0.12

Butyric acid

0.64 ± 0.03

0.28 ± 0.01

0.24 ± 0.01

0.32 ± 0.02

1.47 ± 0.07

0.32 ± 0.02

0.74 ± 0.04

0.45 ± 0.02

  1. Each value is an average of three parallel replicates