منابع مشابه
The oxydase reaction of human milk.
Although it has been known for some time that ferments are present in milk, comparatively little attention has been devoted to the question. Not only the nature and source of these ferments but also their role in physiology is unknown, so that there is little wonder that their presence has not found any application in practice. Oxydase is a notable exception to this generalization. Since the pu...
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Reductive activation of O2 by glucose oxidase and by copper amine oxidases (and also by tyrosine hydroxylase and lypoxygenase) illustrate very interesting spin chemistry. The rate-determining step in these processes is connected with electron transfer from reduced cofactor (E) to O2 and is, in fact, the triplet –> singlet intersystem crossing (ISC) at the stage of the radical pair O2 − . . . E+...
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Membrane fractions o f the cyanobacterium Synechococcus 6301 obtained by french press treatment following sonication catalyzed an oxygen-dependent oxydation o f cysteine to cystine. For 1 0 2 consumed four cysteine were oxydized. Oxygen uptake was com pletely inhibited by 1 mM KCN. Only Dand L-cysteine were active and partial activity was observed with DL-homocysteine and cysteamine. N o activi...
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NADPH oxidase (Nox) is a unique, multi-protein, electron transport system that produces large amounts of superoxide via the reduction of molecular oxygen. Nox-derived reactive oxygen species (ROS) are known to be involved in a variety of physiological processes, including host defense and signal transduction. However, over the past decade, the involvement of (Nox)-dependent oxidative stress in ...
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The O2 generated by this enzyme serves as the starting material for the production of a vast assortment of reactive oxidants, including oxidized halogens, free radicals, and singlet oxygen. These oxidants are used by phagocytes to kill invading microorganisms, but they also cause a lot of what the military would call ‘‘collateral damage’’ to nearby tissues, so their production has to be tightly...
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ژورنال
عنوان ژورنال: médecine/sciences
سال: 2016
ISSN: 0767-0974,1958-5381
DOI: 10.1051/medsci/20163210014