Xantine oxidase，XOD，黄嘌呤氧化酶

Xantine oxidase from Microorganism hypoxantine + O2 + H2O ----> Xantine + H2O2 Xantine + O2 + H2O ----> Uric Acid + H2O2 This enzyme is used for enzymatic determination of inorganic phosphorus, 5'nucleotidase and adenosine deaminase when coupled with Purine-nucleoside phosphorylase (PNP) and uricase (UAO).

• Name: Xantine oxidase

• Appearance: Reddish brown amorphous powder, lyophilized

• Activity: Grade II, 10U/mg-solid or more

• Contaminants: Catalase ≤ 5.0 %, Adenosine deaminase ≤ 1.0×10-3 %, Uricase ≤ 1.0×10-3 %, Phosphatase ≤ 1.0×10-3 %, Purine-nucleoside phosphorylase ≤ 5.0×10-3 %

• Stabilizers: Sodium glutamate, BSA

• Stabilit:y Stable at - 20°C for at least 12 months

• Molecular weight: approx. 160,000

• Isoelectric point: 4.0 ± 0.1

• Michaelis constants: 4.5×10-5M (Xanthine), 7.6×10-5M (Hypoxanthine)

• Inhibitors: Reducing agents, Hg2+, Ag+,MIA

• Optimum pH: 7.5 - 8.0

• Optimum temperature: 65°C

• pH Stability: pH 6.5 - 9.0 (25°C, 15hr)

• Thermal stability: below 55°C (pH 8.0, 30min)