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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