Figure 4From: Global transcriptomic analysis of an engineered Escherichia coli strain lacking the phosphoenolpyruvate: carbohydrate phosphotransferase system during shikimic acid production in rich culture medium Proposed transcriptional regulatory network of the sigma factors in E. coli PB12.SA22 in EXP/STA1, EXP/STA2 and STA1/STA2 comparisons. U, unspecified sigma factor.Back to article page