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Effect of sodium trifluoroacetate (TFA) on fermentation (A), kinetics of PMLA production with 25 mmol/L TFA (B) and 100 mmol/L TFA (C). The results in Fig. 3 A was obtained in the experiment with 500 mL flasks, and the others were from the experiments with a 2.7 L bioreactor. The TFA was added at the initial fermentation phase. Data are average values and standard deviations of two experiments.
