The PTS reactions in P. putida. The C branch of the PTS is shown on the left hand side from PEP (reaction r4) while the second branch is shown on the right hand side (reactions r1−r3). The phosphryl group from the final protein in the second branch, PtsN is not metabolized. However, there is evidence that cross talk occurs between the two branches. The C branch transfers the phosphryl group to the second branch directly to PtsN (reaction r5).
Kremling et al. BMC Systems Biology 2012 6:149 doi:10.1186/1752-0509-6-149