FIGURE 6.

Overview of the C. jejuni glutamate generating enzymes and involved transport systems. Under low oxygen conditions in the presence of additional electron acceptors, RacR is activated and enhances the production of GGT and GOGAT (bold and underlined). Glutamine and glutathione are converted to glutamate in the periplasm by GGT; glutamate is consequently imported and used as carbon/energy source and anabolic precursor. Independent of GGT, glutamine can be imported and converted to glutamate by GOGAT, however, this process is dependent on the presence of additional carbon/energy sources.