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• Nitrifying bacteria

  Nitrifying bacteria are chemolithotrophic organisms that include species of the genera Nitrosomonas, , Nitrobacter and . These bacteria get their energy by the oxidation of inorganic nitrogen compounds. Types include ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB). Many species of nitrifying bacteria have complex internal membrane systems that are the location for key enzymes in nitrification: ammonia monooxygenase (which oxidizes ammonia to hydroxylamine), hydroxylamine oxidoreductase (which oxidizes hydroxylamine to nitric oxide - which is oxidized to nitrite by a currently unidentified enzyme), and nitrite oxidoreductase (which oxidizes nitrite to nitrate).

• Comammox

  nitrifier to be isolated in pure culture. Kinetic and physiological analysis of Nitrospira inopinata de