Purine-Nucleoside Phosphorylase

**Definition:** An enzyme that catalyzes the reaction between a purine nucleoside and orthophosphate to form a free purine plus ribose-5-phosphate. EC 2.4.2.1.

**Tree numbers:** - D08.811.913.400.725.800

**Synonyms:** - Inosine Phosphorylase - Purine Nucleoside Phosphorylases