Noun
an enzyme of nitrogen-fixing microorganisms that catalyzes the conversion of nitrogen to ammonia
Source: WordNetAlthough oxygen once promoted nitrogen fixation by making molybdenum available in water, it also directly poisons nitrogenase enzymes. Source: Internet
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. Source: Internet