Nevertheless, inactivation of lysC or ptsP prevented the utilization of Pro-Gly-Gly and other oligopeptides. In vitro pulldown experiments revealed that EINtr interacts with the aspartokinase. Puried EINtr is phosphorylated by ATP in the presence of cell extracts, and the phosphorylation is prevented when aspartokinase is added (412). What is the function of the PTSNtr?
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