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Acetylation levels of GS enzymes are influenced by extracellular nitrogen availability or the absence of AcuA, SrtN, or GlnR. (A) Acetylation levels of GlnA1 and GlnA4 of S. erythraea grown in minimal medium with NXS/NL nitrogen. (B) Acetylation levels of GlnA1/GlnA4 in S. erythraea cells (WT and ΔglnR strains). (C) Acetylation levels of GlnA1/GlnA4 in S. erythraea cells (WT, ΔacuA, and ΔsrtN strains).
