Figure 4From: Metabolic regulation of Escherichia coli and its phoB and phoR genes knockout mutants under phosphate and nitrogen limitations as well as at acidic conditionComparison of the transcript levels of the wild type and its phoB mutant cultivated under different pH condition and different P concentrations: (a) global regulatory genes, (b) PhoB regulated genes, (c) metabolic pathway genes, and (d) respiratory chain genes.Back to article page