Hassan Y Aboul-Enein et al.
Preparative biochemistry & biotechnology, 33(3), 173-187 (2003-08-15)
Xanthine oxidase (XO), purified from buttermilk was subjected to modification with N-phenylmaleimide, p-toluene-sulfonyl chloride, and 2-mercaptobenzimidazole. Spectrophotometric monitoring of the enzyme before and after treatment with these modifiers are presented. The results show that the interaction of XO with the