Regulation of Expression of Oxacillin-Inducible Methionine Sulfoxide Reductases in Staphylococcus aureus

Figure 5

Analysis of msrA1/msrB promoter-lacZ fusion in S. aureus COL in response to oxacillin. Bacterial culture was grown in TSB to OD₆₀₀ = 0.3 and then exposed to oxacillin (0.4 and 1.0 mg mL⁻¹, resp.) for 2 h. Subsequently, cells were collected via centrifugation and the β-galactosidase activity was determined. Values indicate averages of data from at least three independent experiments ± standard error ( significant at ).