2.7.7.8 5-Fluorouridine diphosphate - 4492 2.7.7.8 6-azauridine - 2133 2.7.7.8 Acridine orange - 4219 2.7.7.8 Acridine orange inhibition of polymerization 4219 2.7.7.8 ADP inhibits ADP-phosphate exchange 13 2.7.7.8 ATP 1.6 mM, 25% inhibition of ADP polymerization 4 2.7.7.8 ATP 5 mM, 28°C, presence of MgCl2, 30% residual activity. Allosteric inhibition of both polymerization and phosphorolytic activities, mixed-type inhibition toward phosphate 4 2.7.7.8 beta,gamma-Imido-ATP 5 mM, 28°C, presence of MgCl2, 50% residual activity 20157 2.7.7.8 chlortetracycline competitive inhibition of ADP polymerization 8065 2.7.7.8 citrate a PNPase-mediated response to citrate, and PNPase deletion broadly impacts on the metabolome. PNPase-dependent cells show reduced growth in the presence of increased citrate concentration. In vitro, citrate directly binds and modulates PNPase activity, and the enzyme is inhibited by binding of metal-chelated citrate, predominantly complexed as magnesium-citrate, in the active site at physiological concentrations. In the contrary, metal-free citrate is bound at a vestigial active site, where it stimulates PNPase activity 131