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L-arginine consumption by wild-type and genetically engineered H. pylori strains. H. pylori 26695 strains were inoculated at 5 × 105 CFU/ml in RPMI 1640 medium containing 10% FBS and grown for 48 hours. The culture supernatant was measured for L-arginine by HPLC-ECD as described in Materials and Methods. Control, uninoculated media.
