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

Figure 6

Analysis of msrA1/msrB promoter-lacZ fusion in wild-type and msrA1-msrB double mutant of S. aureus COL in response to oxacillin. At OD₆₀₀ = 0.5, cells were treated with oxacillin for 2 h and the β-galactosidase activity levels were measured. Values indicate averages of data from at least three independent experiments ± standard error ( significant between samples with and without oxacillin at ; significant between oxacillin treated wild-type and the oxacillin treated msrA1-msrB double mutant at ).