Titlebook: New Horizons in Nitrogen Fixation; Proceedings of the 9 Rafael Palacios,Jaime Mora,William E. Newton Conference proceedings 1993 Springer S

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Nitrogenases: Distribution, Composition, Structure and Functionkaryotes. The biological nitrogen-fixation process provides about 60% of the total production of fixed nitrogen from all natural and industrial sources (1). Since 1930 (2), molybdenum was believed to have an absolutely essential role in nitrogen fixation, even though early on vanadium was demonstrat

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Rhizobium and Legume Nodulation: A Molecular Dialogueof specific organs, the nodules, in which they fix nitrogen. The symbiosis between rhizobia and legumes produce about the same amount of ammonia worldwide as the chemical industry of nitrogen fertilizers and this fixation occurs in nodules. It is therefore important to understand by which mechanisms

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Organization and Regulation of Nitrogen Fixation Geness to identify those genes responsible for the synthesis of nitrogenase, with the expectation that this approach would provide some insight into the biochemical mechanisms of the process. The detailed understanding which we now have of the genetics of diazotrophy in a number of organisms testifies to

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Evolution since Knoxville: Were Nitrogen-Fixing Organisms Wise to Inhabit Land Plants?me of these aspects and add some new ideas, consistent with recently published data. Our overall aim is to define the constraints on nitrogen-fixing symbioses with . over time, beginning at the Upper Cretaceous/Tertiary boundary (the last 100Ma) and projecting into the near future.

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An Integrated, Interdisciplinary Approach to Understanding the Chemistry of Nitrogenasesat the atomic level, how an enzyme as complicated as nitrogenase(s) functions. The “model structures” of FeMo-cofactor and the “P”-clusters derived by Kim & Rees (1992) and Bolin (unpublished) from their electron density maps owe a great deal, at this stage, to synthetic Fe/S/Mo-cluster chemistry of

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