X1875
Xanthine Oxidase from bovine milk
Grade I, ammonium sulfate suspension, ≥0.4 units/mg protein
Synonym(s):
XOD, Xanthine:oxygen oxidoreductase
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About This Item
CAS Number:
UNSPSC Code:
12352204
NACRES:
NA.54
EC Number:
232-657-6
MDL number:
EC Number:
1.17.3.2.
Specific activity:
≥0.4 units/mg protein
Pricing and availability is not currently available.
type
Grade I
Quality Segment
form
ammonium sulfate suspension
specific activity
≥0.4 units/mg protein
foreign activity
uricase ≤0.5%
shipped in
wet ice
storage temp.
2-8°C
General description
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.
Formerly E.C. 1.1.3.22
Application
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)
Biochem/physiol Actions
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. [1]
Physical form
Suspension in 2.3 M (NH4)2SO4 containing 1 mM sodium salicylate
Analysis Note
Protein determined by biuret
Other Notes
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.
1 of 1
This Item | |||
|---|---|---|---|
| specific activity ≥0.4 units/mg protein | specific activity ≥0.8 units/mg protein | specific activity ≥0.1 units/mg protein | specific activity 0.4-1.0 units/mg protein |
| form ammonium sulfate suspension | form ammonium sulfate suspension | form ammonium sulfate suspension | form lyophilized powder |
| shipped in wet ice | shipped in - | shipped in - | shipped in - |
| storage temp. 2-8°C | storage temp. 2-8°C | storage temp. 2-8°C | storage temp. 2-8°C |
| foreign activity uricase ≤0.5% | foreign activity uricase ≤0.1% | foreign activity - | foreign activity - |
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level 300 |
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signalword
Danger
hcodes
Hazard Classifications
Resp. Sens. 1
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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