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Growth of wild-type and nsrR mutant strains of N. meningitidis. (A) Growth of strains was monitored (by OD600 values) during incubation of cultures under oxygen-limited conditions in the presence of 5 mM nitrite. (B) Disappearance of nitrite during growth under oxygen limitation. (C) Growth of strains under fully aerobic incubation conditions. Filled squares, wild-type N. meningitidis MC58; open squares, N. meningitidis nsrR-deficient strain.
