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S. aureus MRSA (ATCC 33591 et COL) membrane permeabilization (PI fluorescence assay; A,B) and depolarization (DiSC3(5) fluorescence; C,D) induced by increasing concentrations of UA (Ursolic acid) (■) and OA (Oleanolic acid) (▲) expressed as a percentage of positive controls considered as 100%: alexidine (5 µM) and valinomycin (10 µM), respectively. The data represent the mean ± SEM of three independent experiments.
