xanthine tests - ορισμός. Τι είναι το xanthine tests
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Τι (ποιος) είναι xanthine tests - ορισμός

CLASS OF ENZYMES
Xanthine oxidoreductase; Xanthine Oxidase; Xanthine:oxygen oxidoreductase
  • A diagram illustrating many of the pathways catalyzed by xanthine oxidase.

xanthic oxide         
  • Xanthine: R<sub>1</sub> = R<sub>2</sub> = R<sub>3</sub> = H<br>Caffeine: R<sub>1</sub> = R<sub>2</sub> = R<sub>3</sub> = CH<sub>3</sub><br>Theobromine: R<sub>1</sub> = H, R<sub>2</sub> = R<sub>3</sub> = CH<sub>3</sub><br>Theophylline: R<sub>1</sub> = R<sub>2</sub> = CH<sub>3</sub>, R<sub>3</sub> = H
CHEMICAL COMPOUND
Methylxanthine; Xanthines; 1H-purine-2,6-diol; Methylxanthines; Methylxantine; Xanthic oxide; Ciodopurine; 2,6-dioxypurine; 2,6-dioxy purine
Uric oxide, xanthin (e).
Xanthine         
  • Xanthine: R<sub>1</sub> = R<sub>2</sub> = R<sub>3</sub> = H<br>Caffeine: R<sub>1</sub> = R<sub>2</sub> = R<sub>3</sub> = CH<sub>3</sub><br>Theobromine: R<sub>1</sub> = H, R<sub>2</sub> = R<sub>3</sub> = CH<sub>3</sub><br>Theophylline: R<sub>1</sub> = R<sub>2</sub> = CH<sub>3</sub>, R<sub>3</sub> = H
CHEMICAL COMPOUND
Methylxanthine; Xanthines; 1H-purine-2,6-diol; Methylxanthines; Methylxantine; Xanthic oxide; Ciodopurine; 2,6-dioxypurine; 2,6-dioxy purine
·add. ·- ·Alt. of Xanthin.
xanthine         
  • Xanthine: R<sub>1</sub> = R<sub>2</sub> = R<sub>3</sub> = H<br>Caffeine: R<sub>1</sub> = R<sub>2</sub> = R<sub>3</sub> = CH<sub>3</sub><br>Theobromine: R<sub>1</sub> = H, R<sub>2</sub> = R<sub>3</sub> = CH<sub>3</sub><br>Theophylline: R<sub>1</sub> = R<sub>2</sub> = CH<sub>3</sub>, R<sub>3</sub> = H
CHEMICAL COMPOUND
Methylxanthine; Xanthines; 1H-purine-2,6-diol; Methylxanthines; Methylxantine; Xanthic oxide; Ciodopurine; 2,6-dioxypurine; 2,6-dioxy purine
['zan?i:n]
¦ noun Biochemistry a crystalline compound formed in the metabolic breakdown of nucleic acids and related to caffeine and other alkaloids.
Origin
C19: from xanthic (from Gk xanthos 'yellow') + -ine4.

Βικιπαίδεια

Xanthine oxidase

Xanthine oxidase (XO, sometimes 'XAO') is a form of xanthine oxidoreductase, a type of enzyme that generates reactive oxygen species. These enzymes catalyze the oxidation of hypoxanthine to xanthine and can further catalyze the oxidation of xanthine to uric acid. These enzymes play an important role in the catabolism of purines in some species, including humans.

Xanthine oxidase is defined as an enzyme activity (EC 1.17.3.2). The same protein, which in humans has the HGNC approved gene symbol XDH, can also have xanthine dehydrogenase activity (EC 1.17.1.4). Most of the protein in the liver exists in a form with xanthine dehydrogenase activity, but it can be converted to xanthine oxidase by reversible sulfhydryl oxidation or by irreversible proteolytic modification.