X4500

Xanthine Oxidase from bovine milk

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

• Sinônimo(s): Schardinger enzyme, XnOx, hypoxanthine oxidase, XOD, Xanthine:oxygen oxidoreductase
• Número CAS: 9002-17-9
• Número da licença da enzima: 1.17.3.2.
• Número CE: 232-657-6
• Número MDL: MFCD00082145
• Código UNSPSC: 12352204
• NACRES: NA.54

Propriedades

• fonte biológica: bovine milk
• Nível de qualidade: 200
• tipo: Grade III
• forma: ammonium sulfate suspension
• atividade específica: ≥0.8 units/mg protein
• técnica(s): inhibition assay: suitable
• cor: faint brown to dark brown
• nº de adesão UniProt: A0A3Q1LW91; A0A3Q1MM92; A0A3S5ZPW7
• atividade externa: uricase ≤0.1%
• temperatura de armazenamento: 2-8°C

Descrição

Descrição geral

Research area: Cell Cycle

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 is characterized with two flavin molecules (FAD), two molybdenum atoms, and eight iron atoms bound per enzymatic unit.

Formerly E.C. 1.1.3.22

Aplicação

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)catalyzes the hydroxylation of hypoxanthine to xanthine and xanthine to uric acid. Xanthine oxidase activity is inhibited by folic acid. [7] and various other inhibitors including 3,4-Dihydroxy-5-nitrobenzaldehyde (DHNB), febuxostat and allopurinol. XO and xanthine dehydrogenase (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

Armazenamento e estabilidade

Tightly closed. Dry. Keep locked up or in an area accessible only to qualified or authorized
persons

Nota de análise

Protein determined by biuret

Informações de segurança

• Pictogramas: GHS08
• Palavra indicadora: Danger
• Frases de perigo: H334
• Declarações de precaução: P261 - P284 - P304 + P340 + P312 - P501
• Classificações de perigo: Resp. Sens. 1
• Código de classe de armazenamento: 11 - Combustible Solids
• Classe de risco de água (WGK): WGK 3
• Ponto de fulgor (°F): Not applicable
• Ponto de fulgor (°C): Not applicable
• Equipamento de proteção individual: Eyeshields, Gloves, type N95 (US)