X4875
Xanthine Oxidase from bovine milk
Grade IV, ammonium sulfate suspension, ≥0.1 units/mg protein
Synonym(s):
XOD, Xanthine:oxygen oxidoreductase
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About This Item
CAS Number:
Enzyme Commission number:
1.17.3.2.
EC Number:
MDL number:
UNSPSC Code:
12352204
NACRES:
NA.54
Recommended Products
biological source
bovine milk
type
Grade IV
form
ammonium sulfate suspension
specific activity
≥0.1 units/mg protein
storage temp.
2-8°C
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General description
Research area: Cell CycleXanthineoxidase (XO) is a homodimer. It is made up of two sub-units each made up of onemolybdenum and two iron-sulphur (2Fe-2S) centers.
Formerly E.C. 1.1.3.22
Application
Xanthine Oxidase from bovine milk has been used in superoxide dismutaseactivity assay.Xanthine oxidase may be suitable for producing amperometric biosensors and designing-flavonoid-type inhibitors against XO for treating inflammatory diseases, gout, and hyperuricemia. It may also be used in the synthesis of superoxide because of aldehyde oxidation.
Biochem/physiol Actions
Although xanthine oxidase is found widely distributed in multiple tissues, it is highly expressed in endothelial and epithelial cells. Its expression was also increased in infected tissues where it was shown to have an anti-microbial effect due to its ability to generate reactive oxygen species. Xanthineoxidase plays an important role in catalyzing the hydroxylation ofhypoxanthine to Xanthine. Later, xanthine is converted to uric acid isexcreted by the kidneys.
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.
Unit Definition
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.
Physical form
Suspension in 2.3 M (NH4)2SO4 containing 1 mM sodium salicylate
Analysis Note
Protein determined by biuret
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Resp. Sens. 1
Storage Class Code
10 - Combustible liquids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
Certificates of Analysis (COA)
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Instructions for working with enzymes supplied as ammonium sulfate suspensions
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