Fig. 5From: Deciphering the crucial roles of transcriptional regulator GadR on gamma-aminobutyric acid production and acid resistance in Lactobacillus brevisGrowth, GABA and carbon source profiles in a fed-batch fermentation and b mixed-feed fermentation between strain 367 and strain D17. MSG was separately added at 6 h, 12 h, 18 h and 24 h. For mixed-feed fermentation, solution of glucose (300 g/L) was continuously added at a rate of 5 mL/h from 12 h to 36 hBack to article page