Deficiency in ArgEF or CpcA but not ArgB decreases the cellular ornithine content.

ΔakuB and ΔargEF were supplemented either with 5 or 1 mM arginine; Af293 and ΔargB were supplemented either with 1 or 0.2 mM arginine. Individual amino acid pools are given in % of the total free amino acids and normalized to that of the respective wt. Amino acid pools up- or down-regulated >1.5- and >3-fold in mutant strain versus wt are in bold and bold, respectively. Given values represent the mean of three biological replicates, the standard deviations are given in Table S4.