nitrogenase
Noun
Meaning
an enzyme of nitrogen-fixing microorganisms that catalyzes the conversion of nitrogen to ammonia
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Although oxygen once promoted nitrogen fixation by making molybdenum available in water, it also directly poisons nitrogenase enzymes.
The microbial genes required for nitrogen fixation are widely distributed in diverse environments. citation citation Enzymes responsible for nitrogenase action are very susceptible to destruction by oxygen.