Fig. 5From: Engineering of global transcription factor FruR to redirect the carbon flow in Escherichia coli for enhancing l-phenylalanine biosynthesisLevels of intermediates involved in L-phenylalanine biosynthesis were detected in the ME20 (PHE01) and MF20 (FruRE173K) at the cultivation of 20 h. n = 6 independent biological samples; **p < 0.01, ***p < 0.001Back to article page