Table 2 Comparison of K. pneumoniae parent strain (KG1) and the Δ ldhA using several carbon sources in a 12-h flask cultivation, the values represent mean ± SD

KG1

Glucose

44.41 ± 0.45

13.82 ± 0.05

2.05 ± 0.03

3.34 ± 0.15

0.70 ± 0.04

0.65 ± 0.02

3.24 ± 0.21

4.63 ± 0.14

0.31

0.82

0.98

Lactose

24.04 ± 0.23

5.16 ± 0.03

2.05 ± 0.02

0.53 ± 0.03

1.35 ± 0.10

0.35 ± 0.03

1.29 ± 0.05

2.42 ± 0.08

0.21

0.66

1.57

Fructose

38.11 ± 0.32

13.26 ± 0.11

2.64 ± 0.04

1.53 ± 0.06

0.81 ± 0.06

0.54 ± 0.06

3.68 ± 0.12

4.02 ± 0.07

0.35

0.97

1.13

Galactose

31.52 ± 0.28

10.45 ± 0.08

1.92 ± 0.02

3.31 ± 0.18

0.80 ± 0.07

0.67 ± 0.04

3.30 ± 0.11

3.49 ± 0.11

0.33

1.01

1.28

Maltose

41.63 ± 0.35

15.05 ± 0.10

3.19 ± 0.03

2.58 ± 0.21

0.38 ± 0.02

—

4.53 ± 0.23

3.54 ± 0.05

0.36

1.24

1.30

ΔldhA

Glucose

44.74 ± 0.21

15.87 ± 0.08

2.38 ± 0.03

0.05 ± 0.01

0.83 ± 0.04

1.75 ± 0.10

5.42 ± 0.32

4.84 ± 0.05

0.35

1.04

1.13

Lactose

18.24 ± 0.15

2.97 ± 0.05

1.66 ± 0.02

0.44 ± 0.05

2.16 ± 0.04

0.19 ± 0.03

1.29 ± 0.16

1.57 ± 0.03

0.16

0.54

1.34

Fructose

49.52 ± 0.22

16.97 ± 0.24

3.04 ± 0.04

0.21 ± 0.06

0.30 ± 0.05

0.67 ± 0.02

4.92 ± 0.18

4.49 ± 0.08

0.34

1.11

0.99

Galactose

47.04 ± 0.28

14.33 ± 0.15

2.82 ± 0.02

0.12 ± 0.02

0.81 ± 0.03

2.11 ± 0.11

5.55 ± 0.22

4.49 ± 0.04

0.30

1.13

1.09

Maltose

49.59 ± 0.35

18.75 ± 0.11

3.95 ± 0.07

0.08 ± 0.02

0.27 ± 0.05

1.37 ± 0.05

6.01 ± 0.24

5.06 ± 0.15

0.38

1.18

1.22