from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An enzyme of nitrogen-fixing bacteria that catalyzes the conversion of nitrogen to ammonia.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The enzyme, in nitrogen-fixing bacteria, that catalyzes the conversion of atmospheric nitrogen into ammonia.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an enzyme of nitrogen-fixing microorganisms that catalyzes the conversion of nitrogen to ammonia


from Wiktionary, Creative Commons Attribution/Share-Alike License

nitrogen +‎ -ase


  • Fortunately, natural selection has already devised the perfect solution: a bacterial enzyme known as nitrogenase, which can fix nitrogen at room temperature using only a collection of metal ions, including the unusual molybdenum ion, and a hefty dose of energy-giving ATP.


  • Time will tell whether these findings are relevant to how dinitrogen is reduced to ammonia in nature on a huge scale by nitrogenase enzymes.

    Richard R. Schrock - Autobiography

  • Only a very limited number of organisms that possess nitrogenase, the enzyme able to cleave N2 at ambient temperature and at normal pressure, can perform this conversion.

    Global material cycles

  • In fact, this was in fact used in one of my favorite ID hypothesis, that the nitrogenase was used to terraform earth for the purpose of seeding life.

    ID Research, Look to the Example

  • Mycorrhiza-soil fertility effects on regrowth, nodulation, and nitrogenase activity of siratro (Macroptilium artropurpureum (DC) Urb.).

    Chapter 8

  • Studies in West Bengal indicated that nitrogenase activity was highest in young nodules irrespective of tree age and concluded that A. nepalensis is capable of fixing significant amounts of nitrogen (Sharma and Ambast 1984).

    Chapter 18

  • Although the biochemistry and physiology of the "alder-type" symbiosis with Frankia are not fully understood, cell-free preparations of nitrogenase have been obtained from Alnus nodules (Postgate 1979).

    Chapter 18

  • In Brazil, Faria et al. (1987b, 1986) found that A. inermis and six more Andira species showed nitrogenase activity with the acetylene reduction assay.

    Chapter 35

  • The researchers found that, when deprived of the oxygen and nitrogen from which it made ammonia and given carbon monoxide instead, vanadium nitrogenase automatically started using it to produce short carbon chains, two or three atoms long. news, business, sport, the Daily Telegraph newspaper, Sunday Telegraph

  • The researchers noted that a chemical compound, acetylene, blocks the activity of nitrogenase.



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