Fig. 6

Intracellular amino acid levels of S. lividans ΔYA8-DG2 on different substrates. The minimal medium used contained 10 mM mannitol, protocatechuate, or 4-hydroxybenzoate. The data reflect absolute concentrations after 12 h. In addition to the overall comparison between the substrates (A, B), the data reveal substrate pathway-specific differences related to the biosynthetic origin of the amino acids (C). For the latter, the diameter of the circles reflects log-scaled concentrations. The data represent mean values and standard deviations from three biological replicates (n = 3) and analytical duplicates