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MICs (mg liter−1) of levofloxacin (LVX) (A) and moxifloxacin (MFX) (B) against the S. aureus Bontemps mutant strain possessing, at day 1, a substitution of lysine for methionine at gyrase A primary structure position 121. Squares, fluoroquinolone; triangles, NXL101.
