Titlebook: Nitrogen Fixation: Fundamentals and Applications; Proceedings of the 1 Igor A. Tikhonovich,Nikolai A. Provorov,William E. Conference procee

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Current Plant Science and Biotechnology in Agriculturehttp://image.papertrans.cn/n/image/666677.jpg

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https://doi.org/10.1007/978-94-011-0379-4Bur; Ecology; bacteria; biochemistry; environment; evolution; microorganism; nitrogen; pollution

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The Structures of the Nitrogenase Proteins — An OverviewAt this Congress there is a half-day formal session on the function of nitrogenases together with a workshop on the same subject. Therefore the object of this overview is to provide an analysis of the structural data upon which much of the interpretation of mechanistic experiments is now based.

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Chemical Nitrogen Fixation in Solution present time bacteria (free-living in the soil and in nodules in symbiosis with plants) perform the main part of nitrogen cycle in nature, and the industrial synthesis of ammonia provides people with necessary nitrogen-containing substances (fertilizers, plastic materials, dyes, medicaments, etc.).

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Nitrogenase — After The Structurenderstanding of this enzyme. These structures and their subsequent refinement are described elsewhere in this volume (Smith et al., 1995) and herald a new era in nitrogenase biochemistry and chemistry. We are now in a position to pose mechanistic questions on a much more informed basis, .:

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Mechanistic Studies on Iron-Sulfur-Based Clustersnzymes is well defined (Evans et al, 1993). The chemistry that has to be addressed falls into two headings: the transformations of the substrates and the reactivity of iron-sulfur-based clusters (Figure 1).

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Conference proceedings 1995any fundamental branches of biology andchemistry. These include catalytic mechanisms, protein structure andfunction, molecular organization of genes and the regulation of theiractivities, biochemistry of plants and microorganisms, the signallingand surface interactions between organisms, microbial t

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Integration of Plant and Bacterial Metabolism in Nitrogen Fixing Systemsn and Walsh (1994) is also noteworthy. In this report the structure of nodules from 43 species in 31 different genera of legumes is documented in a tabular summary of features and in a helpful selection of micrographs.

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Nitrogenase and Its Chemical Modelsems involving comparatively weak reducing agents, up to the present time, polynuclear complexes of Mo or V are the most active towards N.. Iron-sulfur clusters are less stable and, so far, catalytic activity towards dinitrogen has been observed only in some cases with highly negative redox potentials.

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Signals Involved in Nodulation and Nitrogen Fixationhich lead to nodulation and nitrogen fixation. . will be the leading microsymbiont but, when appropriate, other microbes will be dealt with. Because of severe space limitation many valuable references had to be omitted.