Abstract
Distribution of phosphoenolpyruvate : lactose phosphotranseferase system (lactose-PTS) in strains of staphylococci isolated from human oral mucosae, was studied. The activity was determined by measuring hydrolysis of o-nitrophenyl-β-D-galactoside in toluene-treated cells supplemented with phosphoenolpyruvate as the phosphate donor. The lactose-PTS was distributed in both Staphylococcus aureus and epidermidis strains.