Fig. 1From: Genetic engineering of Escherichia coli to improve L-phenylalanine productionGrowth curves and fermentation results of the recombinant strains combinational modulating the galp and glk genes with different promoters. a Growth curves of the recombinant strains; b The fermentation results of the recombinant strains in shake flasks. The experiment was repeated three times, and measurements are represented as means with their standard deviationBack to article page