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Role of sarA in the regulation of tst::lux expression during aerobic growth. S. aureus PC1072 (tst::lux) (○, •) and PC1091 (sarA tst::lux) (□, ■) were grown in BHI at 37°C with shaking at 250 rpm as described in Materials and Methods. Bacterial growth was measured by OD600 (○, □), and fusion expression was determined by luciferase activity (•, ■).
