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Titlebook: Secondary Metabolism in Microorganisms, Plants and Animals; Martin Luckner Textbook 19842nd edition Springer-Verlag Berlin Heidelberg 1984

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发表于 2025-3-21 16:50:56 | 显示全部楼层 |阅读模式
书目名称Secondary Metabolism in Microorganisms, Plants and Animals
编辑Martin Luckner
视频video
图书封面Titlebook: Secondary Metabolism in Microorganisms, Plants and Animals;  Martin Luckner Textbook 19842nd edition Springer-Verlag Berlin Heidelberg 1984
描述Many of the reactions and compounds involved in metabolism are almost identical in the different groups of living organisms. They are known as primary metabolic reactions and primary metabolic products. In addition, however, a wide variety of biochemical pathways are characteristic of only a few species of organisms, of single "chemical races" or even of a certain stage of differentiation of special­ ized cells. Such pathways are collectively referred to as "secondary metabolism", and the compounds formed are called "secondary products". Secondary products are frequently revealed by their color, smell, or taste. They are responsible for the flavor of most foodstuffs and beverages and for the color and fragrance of flowers and fruits. Many of them are part of the materia medica, e. g. , alkaloids, cardiac glycosides, antibiotics, or compounds acting as hormones. Others are used by industry, e. g. , rubber, tannins, and cellulose. This book treats the organization and significance of biosynthesis, storage, transformation, and degradation of the most important groups of secondary products in microorganisms, plants, and animals. It shows that the formation of secondary products is a co
出版日期Textbook 19842nd edition
关键词Sekundärstoffwechsel; enzymes; metabolism; microorganism; plants
版次2
doihttps://doi.org/10.1007/978-3-662-02384-6
isbn_ebook978-3-662-02384-6
copyrightSpringer-Verlag Berlin Heidelberg 1984
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发表于 2025-3-21 22:37:26 | 显示全部楼层
Transformation and Degradation of Secondary Products with respect to metabolic stability: (a) the truely metabolically inert end products, (b) the products stable at a given physiological or developmental state, and (c) the substances undergoing continuous turnover.
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Aminotransferases and Amino Acid Decarboxylasesplacement of a pair of electrons adjacent to the .carbon of the amino acid. Depending on the type of enzyme, either a proton is eliminated, as is the case in transamination of amino acids and amines (Fig. 26, pathway A), or the carboxyl group is lost, as is the case in amino acid decarboxylation (Fig. 26, pathway B).
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Cellular Compartmentalization and Channelingese structural characters give rise to high local concentrations of reactants, the protection of reactive intermediates and the directed transport of precursors, intermediates, and products. They favor certain sequences of reactions (metabolic channeling) and thus facilitate the formation and function of metabolic chains.
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What is Secondary Metabolism?ins and their precursors, of most carbohydrates, of some carboxylic acids, etc., cf. Table 6), a vast number of metabolic pathways lead to the formation of peculiar chemical compounds, the so-called “secondary products”. The most characteristic features of these substances are
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Cellular Compartmentalization and Channeling of enzymes and the channeling of precursors, intermediates, and products to the sites of metabolic activity. At the cellular level it is brought about either by membranes separating cytoplasmic and noncytoplasmic areas or by the influence of micro environmental effects which form “microcompartments
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Transformation and Degradation of Secondary Products secondary substances are transformed or are even degraded to compounds of primary metabolism. Three types of secondary compounds may be distinguished with respect to metabolic stability: (a) the truely metabolically inert end products, (b) the products stable at a given physiological or development
发表于 2025-3-23 06:24:02 | 显示全部楼层
Examination of Secondary Metabolic Pathways experiments in unbiological systems, which served to demonstrate the chemical feasibility of certain reactions under “physiological conditions”. This situation changed drastically in the 1950’s when radioactive isotopes became readily available. The use of the so-called tracer technique, i.e.,
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