Fig. 3From: Impact of deletion of the genes encoding acetate kinase on production of L-tryptophan by Escherichia coli Effect of gene modification on accumulation and production rate of acetate in L-tryptophan production. Filled symbols accumulation of acetate, open symbols production rate of acetate. The absolute value of the data less than zero indicates the consumption rate of acetate (p < 0.05)Back to article page