Nitrogen isotope fractionation by alternative nitrogenases and past ocean anoxia

@article{Zhang2014NitrogenIF,
  title={Nitrogen isotope fractionation by alternative nitrogenases and past ocean anoxia},
  author={Xinning Zhang and D. Sigman and François M. M. Morel and A. M. Kraepiel},
  journal={Proceedings of the National Academy of Sciences},
  year={2014},
  volume={111},
  pages={4782 - 4787}
}
  • Xinning Zhang, D. Sigman, +1 author A. M. Kraepiel
  • Published 2014
  • Chemistry, Medicine
  • Proceedings of the National Academy of Sciences
  • Significance Biological nitrogen fixation is the main route by which nitrogen enters the biosphere. This reaction is catalyzed by nitrogenase, a metalloenzyme that exists in forms containing molybdenum, vanadium, or iron only. The contribution of the “alternative” vanadium and iron-only nitrogenases to nitrogen fixation in the present and the past is unknown. Here we show that the nitrogen isotopic composition (15N to 14N ratio) of biomass generated from nitrogen fixation by alternative… CONTINUE READING
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