Publications

Publications List

AuthorTitleTypeYear
2 Publications
Applied Filters: First Letter Of Title: N Reset
Nitrogen isotope fractionation by alternative nitrogenases and past ocean anoxia
X. Zhang, D.M. Sigman, F.M.M. Morel
Journal Article
Biological nitrogen fixation constitutes the main input of fixed nitrogen to Earth s ecosystems, and its isotope effect is a key parameter in isotope-based interpretations of the N cycle. The nitrogen isotopic composition (δ15N) of newly fixed N is currently believed to be∼-10/00, based on measurements of organic matter from diazotrophs using…
Nitrogen stable isotope fractionation by biological nitrogen fixation reveals cellular nitrogenase is diffusion limited
E. *Han, S.H. Kopf, A.E. Maloney, X.E. Ai, D.M. Sigman, X. Zhang
Journal Article

Biological fixation of dinitrogen (N2), the primary natural source of new bioavailable nitrogen (N) on Earth, is catalyzed by the enzyme nitrogenase through a complex mechanism at its active site metal cofactor. How this reaction functions in cellular environments, including its rate-limiting step, and how enzyme structure affects functioning…