Mechanistic Insights on Cellular Nitrogen Isotope Fractionation by Nitrogenase and Implications for the Early nitrogen cycle

Eunah Han1, Ashley E Maloney2, Xuyuan Ai1, Daniel Mikhail Sigman2, Sebastian Kopf3 and Xinning Zhang4, (1)Princeton University, Princeton, NJ, United States, (2)Princeton University, Geosciences, Princeton, United States, (3)University of Colorado at Boulder, Geological Sciences, Boulder, CO, United States, (4)Princeton University, Dept. of Geosciences and Princeton Environmental Institute, Princeton, NJ, United States