Tags: Enzyme.
In enzymology a purine nucleosidase (EC 3.2.2.1) is an enzyme that catalyzes the chemical reactiona purine nucleoside + H2O D-ribose + a purine baseThus the two substrates of this enzyme are purine nucleoside and H2O whereas its two products are D-ribose and purine base.This enzyme belongs to the family of hydrolases specifically those glycosylases that hydrolyse N-glycosyl compounds. The systematic name of this enzyme class is purine-nucleoside ribohydrolase.