Results 191 to 200 of about 16,447 (208)
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Xanthine dehydrogenase in bovine blood serum
Experientia, 1956Le serum sanguin des bovides contient des quantites elevees de xanthine dehydrogenase. On l'a demontre par le dosage de l'acide urique et la reduction du triphenyltetrazolium apres incubation avec de la xanthine. Des experiences complementaires faites avec differents inhibiteurs de la xanthine oxidase et la preparation d'une fraction active donnant le ...
O. R. Affonso +2 more
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Sulfhydryl oxidase-catalyzed conversion of xanthine dehydrogenase to xanthine oxidase
Archives of Biochemistry and Biophysics, 1981Abstract Xanthine oxidase may be isolated from various mammalian tissues as one of two interconvertible forms, viz., a dehydrogenase (NAD+ dependent, form D) or an oxidase (O2 utilizing, form O). A crude preparation of rat liver xanthine dehydrogenase (form D) was treated with an immobilized preparation of crude bovine sulfhydryl oxidase.
Debra A. Clare +3 more
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Regulation of the Kidney Xanthine Dehydrogenase by Glutaminase
Archives Internationales de Physiologie et de Biochimie, 1979The steady-state concentrations of glutamine, glutamate and ammonia in the kidney cells might regulate the rate of renal xanthine dehydrogenase activity. Both glutamate and glutamine were found to be effective inhibitors of the renal xanthine dehydrogenase activity in vivo. The inhibition by glutamate depends essentially on the glutaminase inhibition.
Emilio Mitidieri +2 more
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Xanthine Dehydrogenase and Related Enzymes
1975Xanthine dehydrogenase (XDH), aldehyde oxidase and pyridoxal oxidase are discussed together in this chapter because they share certain features of genetic control, and they seem to be related in a number of ways. These three enzymes and at least six genetic loci, some with multiple alleles, are involved in one of the most complex and interesting gene ...
David T. Sullivan, William J. Dickinson
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Xanthine Dehydrogenase Electrocatalysis: Autocatalysis and Novel Activity
The Journal of Physical Chemistry B, 2011The enzyme xanthine dehydrogenase (XDH) from the purple photosynthetic bacterium Rhodobacter capsulatus catalyzes the oxidation of hypoxanthine to xanthine and xanthine to uric acid as part of purine metabolism. The native electron acceptor is NAD(+) but herein we show that uric acid in its 2-electron oxidized form is able to act as an artificial ...
Kalimuthu, Palraj +2 more
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Excitotoxic increase of xanthine dehydrogenase and xanthine oxidase in the rat olfactory cortex
Developmental Brain Research, 1995Excitotoxic lesions induced by systemic injection of kainic acid, resulted in 2-3-fold increase of xanthine dehydrogenase and xanthine oxidase activities in the rat olfactory cortex 48-72 h after drug administration. A significant increase of the xanthine oxidase/dehydrogenase ratio was also observed at 4 and 48 h post-injection.
Laura Buonamici +5 more
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Xanthine Dehydrogenase in Drosophila : Detection of Isozymes
Science, 1963Two or possibly three isozymes of the enzyme, xanthine dehydrogenase, have been detected in wildtype Drosophila melanogaster by starch-gel electrophoresis. Two genes, rosy and maroon-like, may control these isozymes by producing two different polypeptides that assemble in groups of three or four.
Kirby D. Smith +2 more
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Purification of xanthine dehydrogenase from Drosophila melanogaster
Biochimica et Biophysica Acta (BBA) - Specialized Section on Enzymological Subjects, 19641. 1. An enzymic assay of xanthine dehydrogenase (xanthine: NAD oxidoreductase) from Drosophila melanogaster is reported which is linear with respect to enzyme concentration and is sensitive enough to measure activity in single flies. The assay is based on the change in absorbance at 340 mμ as nicotinamide-adenine dinucleotide is reduced or at 395 mμ
Allen S. Fox +3 more
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Journal of Chemical Ecology, 1993
Xanthine (2,6-dioxypurine), which occurs in certain legumes and other plants, was fed in artificial diet to larvae of two noctuid moth species, a legume specialist,Anticarsia gemmatalis, and a generalist,Spodoptera frugiperda. In addition, diets either lacked or contained allopurinol (4-hydroxypyrazolo(3,4-d)-pyrimidine), an inhibitor of xanthine ...
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Xanthine (2,6-dioxypurine), which occurs in certain legumes and other plants, was fed in artificial diet to larvae of two noctuid moth species, a legume specialist,Anticarsia gemmatalis, and a generalist,Spodoptera frugiperda. In addition, diets either lacked or contained allopurinol (4-hydroxypyrazolo(3,4-d)-pyrimidine), an inhibitor of xanthine ...
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The Journal of Biochemistry, 1994
Although mammalian xanthine oxidase exists originally as a dehydrogenase form in freshly prepared samples, it is converted to an oxidase form during purification, either irreversibly by proteolysis or reversibly by sulfhydryl oxidation of the protein molecule.
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Although mammalian xanthine oxidase exists originally as a dehydrogenase form in freshly prepared samples, it is converted to an oxidase form during purification, either irreversibly by proteolysis or reversibly by sulfhydryl oxidation of the protein molecule.
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