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Table 3 The source and components of the 2,3-BDO pathway constructed and the corresponding BDO titer 1 day post-inoculation in Z. mobilis 9C

From: Metabolic engineering of Zymomonas mobilis for 2,3-butanediol production from lignocellulosic biomass sugars

Strain

Plasmid

Promoter

als source

Enzymes

Acetoin (g/L)

BDO (g/L)

Ethanol (g/L)

9C-BC9

pEZ-BC9

Ptet

B. licheniformis

Als, AldC, Bdh

1.6 ± 0.4

10.8 ± 1.1

26.2 ± 0.5

9C-BC10

pEZ-BC10

Ptet

B. subtilis

Als, AldC, Bdh

1.1 ± 0.5

10.2 ± 2.0

27.4 ± 1.6

9C-BC11

pEZ-BC11

Ptet

B. subtilis

Als, AldC, Bdh

0.7 ± 0.1

13.3 ± 0.7

24.9 ± 0.5

  1. The promoter of als gene in these constructed is driven by inducible promoter Ptet. Culture condition: 40 mL RMG8 with 200 μg/mL spectinomycin in 125-mL flask, 33 °C, 120 rpm. Four replicates each without tetracycline induction