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Enhanced lysine uptake by arginine. Induction of l-lysine uptake by exogenous arginine in P. aeruginosa PAO1 (A) and its argR mutant (B). Cultures grown in glutamate-MMP in the absence (diamond) or in the presence of l-arginine (square) or l-lysine (triangle) were harvested during exponential growth and used for l-lysine transport assays as described in Materials and Methods.
