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Product formation by Mo- and V-nitrogenases in the presence of CO2. Time-dependent formation of CO (A), CH4 (B), C2H4 (C) and C2H6 (D) by Mo-nitrogenase in H2O (blue open triangle, dashed line) or D2O (blue solid triangle, solid line) and by V-nitrogenase in H2O (red open circle, dashed line) or D2O (red solid circle, solid line). Data are presented as mean ± SD (N=3) after background correction.
