Attention:

Certain features of Sigma-Aldrich.com will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.


Protein of The Month

 

September: Xanthine Oxidase
Origin: The gene for Xanthine Oxidase is primarily expressed in the liver and in the gastrointestinal tract; where it is involved in uric acid metabolism.
Application: This enzyme is useful for enzymatic determination of many different chemical compounds, including determination of inorganic phosphorus, 5′-nucleotidase and adenosine deaminase when coupled with purine-nucleoside phosphorylase and uricase.
How: Xanthine Oxidase generates a superoxide radical while catalyzing the oxidation of xanthine to uric acid.
Did you know: Xanthine Oxidase is a precursor for many biochemical substances and pharmaceutical products, including caffeine.
 

Learn More:


Return to mainpage