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Anr is required for HHQ-dependent colony sheen and HQNO-dependent S. aureus inhibition at 1% oxygen in lasR mutants. (A) J215; (B) PA14. Top row, colony biofilms at 5 days on T-broth agar. Bottom row, Whatman paper discs with 24-h biofilms grown on T-broth agar were transferred to tryptic soy agar plates spread with a lawn of S. aureus and grown for an additional 16 h.
