Fig. 6From: Expression regulation of multiple key genes to improve l-threonine in Escherichia coliComparison of cell growth (a), l-threonine production (b), acetate concentration (c), pyruvate concentration (d), oxaloacetate concentration (e), and NADPH level (f) during flask fermentation of TWF001, TWF058, TWF063, TWF066, TWF070, TWF077, TWF078 and TWF083. The error bars indicate the standard deviations from three independent experimentsBack to article page