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Denitrification in HB27 derivatives. (A) Anaerobic growth of the indicated strains on nitrate (40 mM) after 48 h at 70°C. (B) Anaerobic growth with nitrite (10 mM) after 48 h at the same temperature. (C) N2O production by the indicated strains after 5 days of anaerobic growth with nitrate (10 mM). Strains are named as in Fig. 1. The standard deviations are indicated.
