Tags: Enzyme.
In enzymology a pyrimidine-nucleoside phosphorylase (EC 2.4.2.2) is an enzyme that catalyzes the chemical reactiona pyrimidine nucleoside + phosphate a pyrimidine base + alpha-D-ribose 1-phosphateThus the two substrates of this enzyme are pyrimidine nucleoside and phosphate whereas its two products are pyrimidine base and alpha-D-ribose 1-phosphate.This enzyme belongs to the family of glycosyltransferases specifically the pentosyltransferases.