Fig. 5From: Improvement of the production of L-tryptophan in Escherichia coli by application of a dissolved oxygen stage control strategyEffects of DO stage control strategy on concentrations of acetate and glutamate in L-tryptophan fermentation. a, b and c Concentration of acetate, production rate of acetate, and concentration of glutamate with different DO stage control strategies, respectively (p < 0.05)Back to article page