X1875
Xanthine Oxidase from bovine milk
Grade I, ammonium sulfate suspension, ≥0.4 units/mg protein
Sinónimos:
XOD, Xanthine:oxygen oxidoreductase
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About This Item
Número de CAS:
Comisión internacional de enzimas:
1.17.3.2.
Número CE:
Número MDL:
Código UNSPSC:
12352204
NACRES:
NA.54
Productos recomendados
tpo
Grade I
Nivel de calidad
Formulario
ammonium sulfate suspension
actividad específica
≥0.4 units/mg protein
actividad extraña
uricase ≤0.5%
Condiciones de envío
wet ice
temp. de almacenamiento
2-8°C
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Descripción general
enthält auch proteolytische Aktivität
Xanthine Oxidase (XOD) is a metal flavoprotein. It has flavin adenine dinucleotide (FAD), molybdenum and iron in the ratio 2:2:8. This homodimer has a molecule weight of 290kDa. It is a member of the molybdenum-protein family. This enzyme consists of two separated substrate-binding sites.
Aplicación
Xanthine Oxidase from bovine milk has been used:
- in the preparation of xanthine oxidase (XO) solution for 5-(diethoxyphosphoryl)-5-methyl-1-pyrroline-N-oxide (DEPMPO)-spin trapping assay
- in in vitro XO assay for screening Vietnamese medicinal plants for XO inhibitory activity
- as a standard to determine XO activity
- as a standard to test the synergistic effect of docosahexaenoic acid (DHA)
Acciones bioquímicas o fisiológicas
Hydroxylation of hypoxanthine to xanthine and xanthine to uric acid is catalyzed by xanthinebb oxidase (XO) enzyme.
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.
Xanthine oxidase was shown to be involved in the reduction of cytochrome c by the generation of superoxide anions following the oxidation of xanthine. These free radicals are responsible for reducing cytochrome c.
Definición de unidad
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 containing 1 mM sodium salicylate
Nota de análisis
Protein determined by biuret
Palabra de señalización
Danger
Frases de peligro
Consejos de prudencia
Clasificaciones de peligro
Resp. Sens. 1
Código de clase de almacenamiento
11 - Combustible Solids
Clase de riesgo para el agua (WGK)
WGK 3
Punto de inflamabilidad (°F)
Not applicable
Punto de inflamabilidad (°C)
Not applicable
Equipo de protección personal
Eyeshields, Gloves, type N95 (US)
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Artículos
Instructions for working with enzymes supplied as ammonium sulfate suspensions
Protocolos
Enzymatic Assay of Superoxide Dismutase
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