Effect of the ATPase-inhibitor NaN3 on the susceptibility of MRSA (ATCC 33591) to ORV. The viability of bacteria was determined spectrophotometrically (OD600) after incubation for 24 h with 62.5 µg/ml ORV and 0.001% NaN3. Data are the mean of three-independent experiments. *P<0.01, vs. ORV alone. NaN3, sodium azide; MRSA, MRSA, methicillin-resistant Staphylococcus aureus; ORV, oxyresveratrol; CON, control; OD600, optical density at 600 nm.