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Table 3 Comparative analysis of γ-PGA production at 50 °C in 10 L fermentor between GXA-28 and GXG-5

From: Production of poly-γ-glutamic acid by a thermotolerant glutamate-independent strain and comparative analysis of the glutamate dependent difference

Strain

Maximum OD660nm

Maximum γ-PGA yield (g/L)

Residual glucose (g/L)

Residual l-glutamate (g/L)

Time (h)

γ-PGA productivity (g/L/h)

Conversion efficiency (%)

GXA-28

4.82 ± 0.18

16.39 ± 0.57

2.75 ± 0.23

4.38 ± 0.26

22

0.75

81.95a

GXG-5

4.50 ± 0.15

19.50 ± 0.75

0

–c

34

0.57

78.00b

  1. aThe conversion efficiency was defined as the ratio of γ-PGA yield and exogenous l-glutamate concentration
  2. bThe conversion efficiency was defined as the ratio of γ-PGA yield and glucose concentration
  3. cNo detect
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