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Characterization of the EfCIV583-encoded Stl repressor. (a) Schematic representation of the different blaZ transcriptional fusions. The relevant genes are shown. (b) S. aureus RN4220 strains containing the plasmids represented in a were assayed for β-lactamase activity under standard conditions, or after MC induction. Samples were normalized for total cell mass. Values are presented are the averages (±s.d.) of three independent assays.
