Fig. 1

Results from batch fermentation tests in shake flasks with different concentrations of glucose and AA; AA concentration at different fermentation time points compared to fermentation broth pH profile; Test 1: 0.5 g/L glucose + 0.5 g/L AA; Test 2: 1.0 g/L glucose + 1.0 g/L AA; Test 3: 2.0 g/L glucose + 2.0 g/L AA