Xanthine Oxidase from bovine milk Grade III, ammonium sulfate suspension, 1.0-2.0 units/mg protein Sigma X4500
По запросу
- Производитель: Sigma
- Каталожный номер:
X4500 - CAS номер : 9002-17-9
Analysis Note
Protein determined by biuret
Biochem/physiol Actions
Xanthine oxidase activity is inhibited by folic acid. 5
Xanthine oxidase is a molybdenum-containing enzyme that is found in the cytosol, and may be strongly inhibited by flavonoids.1,2 It plays a vital role in the metabolism of some drugs, as well as purines and pyrimidines.3 It is also known to be a biological source of reactive oxygen species.4
General description
Formerly E.C. 1.1.3.22
Preparation Note
Chromatographically purified
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, 10 mM sodium phosphate buffer, pH 7.8, containing 1 mM EDTA and 1 mM sodium salicylate
Характеристики реактива | |
storage temp. | 2-8°C |