Total free amino acid pool is altered in absence of SrbA.

Individual amino acid pools (aa) are given in % of the total free amino acids ± STD. aa upregulated >1.5 and >3 fold in CEA10 or ΔsrbA during iron starvation compared to iron sufficiency are marked in a and b, respectively; aa pools down-regulated >1.5 and >3 fold are marked in c and d respectively. aa pools upregulated >1.5 and >3 fold in ΔsrbA compared to CEA10 in the same condition are marked in a and b, respectively; aa pools down-regulated >1.5 and >3 fold are marked in c and d, respectively.