Energetics oxidative metabolism

Molecular hydrogen plays a major role on the oxidation-reduction processes involved in bacterial energetics, as well as in the degradation and conversion of biomass related with all major elemental cycles. Hydrogenase has a key role on this process and catalyzes the reversible oxidation of dihydrogen, important in bacterial anaerobic metabolism ... 

Janssen PH, B Schink (1995a) Metabolic pathways and energetics of the acetone-oxidizing sulfate-reducing bacterium Desulfobacterium cetonicum. Arch Microbiol 163 188-194. 

Marusak RA, Mears CF. 1995. Exploration of selected pathways for metabolic oxidative ring opening of benzene based on estimates of molecular energetics In Valentine JS, Foote CS, Greenberg A, Liebman JE, editors. Active Oxygen in Biochemistry. New York Chapman and Hall. p. 336. 

CMD = carbon metabolism determined, i.e., energetically independent. a This range results from differences in possible energy gains derived from the oxidation of formaldehyde. 

The thiosulfate reductase/rhodanese/APS reductase system is thus supported by evidence from direct enzyme assay, whole-cell metabolism and energetics, and S-labehng experiments and provides a robust hypothesis to explain thionate oxidation and energy conservation in at least some chemolithotrophs. 

We begin Part II with a discussion of the basic energetic principles that govern all metabolism (Chapter 13). We then consider the major catabolic pathways by which cells obtain energy from the oxidation of various fuels (Chapters 14 through 19). Chapter 19 is the pivotal point of our discussion of metabolism it concerns... 

The principles of oxidation-reduction energetics described above apply to the many metabolic reactions that involve electron transfers. For example, in many organisms, the oxidation of glucose supplies energy for the production of ATP. The complete oxidation of glucose ... 

This chapter is mainly concerned with the contribution of the tricarboxylic acid cycle to carbohydrate metabolism. The TCA cycle is the main source of electrons for oxidative phosphorylation, and thereby the major energetic sequence in the metabolism of aerobic cells or organisms. It serves as the main distribution center of metabo-... 

Chapters 15 and 16 especially demonstrate the broad range of application of thermodynamics to chemical processes. In the discussions of the Haber cycle, synthesis of diamond, solubility of calcite, and the thermodynamics of metabolism, techniques are used to solve a specific problem for a particular substance. On the other hand, in the discussion of macrocyclic complexes, the description and interpretation involves the comparison of the properties of a number of complexes. This global approach is particularly helpful in the description of the energetics of ternary oxides in Chapter 15 and the stabilities of proteins and DNA in Chapter 16, where useful conclusions are obtained only after the comparison of a large amount of experimental data. 

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