Positions of acyl modification sites in RNA polymerase subunits.

Location of acetylation (red line) and succinylation (blue line) sites with amino acid residue numbers are shown. K638, at which succinylation was reproducibly upregulated in the citrate condition, is underlined. Functional and structural regions are shown with black bars; the positions were estimated using amino acid sequence alignment and structural modeling based on information from E. coli RNAP [60,61].