1) Enzyme 
[flavodoxin] The enzyme is a complex of two proteins containing iron-sulfur centres and molybdenum. == See also == ...
(from the article `Life Sciences`) ...obtain food and shelter from the plant.) Thomas Ott and his team of scientists at the institute found that the plant hemoglobin carries away ...
An enzyme system that catalyzes the reaction of molecular nitrogen (N2) to ammonia (NH3).
<enzyme> Nitrogenase is a member of a family of enzymes found in nitrogen fixing bacteria that reduce nitrogen to ammonia (also ethylene to acetylene). ... (18 Nov 1997) ... 
Nitrogenases are enzymes found in nitrogen-fixing bacteria that reduce nitrogen to ammonia (also ethylene to acetylene).
Type: Term Pronunciation: nī′trō-jĕ-nās Definitions: 1. Formerly a general term used to describe enzyme systems that catalyze the reduction of molecular nitrogen to ammonia in nitrogen-fixing bacteria; now specifically applied to enzymes that carry out this reaction with reduced ferredoxin and ATP; typically nitrogenase co...
[n] - an enzyme of nitrogen-fixing microorganisms that catalyzes the conversion of nitrogen to ammonia
noun an enzyme of nitrogen-fixing microorganisms that catalyzes the conversion of nitrogen to ammonia
an enzyme complex that catalyzes the reduction of molecular nitrogen in the nitrogen-fixation process of bacteria.