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Name of most crucial enzyme found in root nodules for $\mathrm{N}_2$-fixation? Does it require a special pink coloured pigment for its functioning? Elaborate.
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The most crucial enzyme found in the root nodules for $\mathrm{N}_2-$ fixation is nitrogenase. It is a Mo-Fe protein that catalyses the conversion of atmospheric nitrogen to ammonia. Pink colour pigment present is root nodules of leguminous plants is called leghaemoglobin creates anaerobic conditions for the functioning of nitrogenase enzyme.
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