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Nitrogenase is a key enzyme complex responsible for biological nitrogen fixation in vivo, converting atmospheric nitrogen into ammonia, which can be utilized by plants for biosynthesis of amino acids, nucleotides, and other nitrogenous compounds. The enzyme consists of two main components, the Fe-protein and the MoFe-protein, and requires ATP and a source of electrons such as reduced ferredoxin or flavodoxin. The primary reaction catalysed by nitrogenase is ___ _________ _________ __________ _________ _________ _______ _________ _____.
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