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Xanthine Oxidase from bovine milk

Grade III, ammonium sulfate suspension, ≥0.8 units/mg protein

XOD, Xanthine:oxygen oxidoreductase
CAS Number:
Enzyme Commission number:
Número EC:
Número MDL:

fonte biológica

bovine milk

Nível de qualidade



Grade III


ammonium sulfate suspension

specific activity

≥0.8 units/mg protein

atividade externa

uricase ≤0.1%

temperatura de armazenamento


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Descrição geral

Formerly E.C.


Xanthine Oxidase from bovine milk has been used:
  • as a source for superoxide generation
  • for the degradation of hypoxanthine
  • for the detection of reactive oxygen species (ROS) in lipid model by electron spin resonance (ESR) spin trap method
  • as a constituent of assay mixture in xanthine oxidase inhibition assay

Ações bioquímicas/fisiológicas

Xanthine Oxidase (XO) belongs to the class of complex metalloflavoproteins. It is produced by oxidation of sulfhydryl residues or by proteolysis of xanthine dehydrogenase (XDH). XO and XDH plays a vital role in the last two steps in the formation of urate. Elevated levels of XO has been observed in the serum of chronic liver disease patients. Therefore, XO can be used as a biomarker for the detection of liver disease.
Xanthine oxidase activity is inhibited by folic acid.
Xanthine oxidase is a molybdenum-containing enzyme that is found in the cytosol, and may be strongly inhibited by flavonoids. It plays a vital role in the metabolism of some drugs, as well as purines and pyrimidines. It is also known to be a biological source of reactive oxygen species.

Definição da unidade

One unit will convert 1.0 μmole of xanthine to uric acid per min at pH 7.5 at 25 °C. Approx. 50% of the activity is obtained with hypoxanthine as substrate.

forma física

Suspension in 2.3 M (NH4)2SO4, 10 mM sodium phosphate buffer, pH 7.8, containing 1 mM EDTA and 1 mM sodium salicylate

Nota de preparo

Chromatographically purified

Nota de análise

Protein determined by biuret


Health hazard

Palavra indicadora


Frases de perigo

Declarações de precaução

Classificações de perigo

Resp. Sens. 1

Código de classe de armazenamento

11 - Combustible Solids



Ponto de fulgor (ºF)

Not applicable

Ponto de fulgor (ºC)

Not applicable

Equipamento de proteção individual

Eyeshields, Gloves, type N95 (US)

Certificate of Analysis

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Certificate of Origin

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Technical Information


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