Tags: Enzyme.
In enzymology a diphosphate-purine nucleoside kinase (EC 2.7.1.143) is an enzyme that catalyzes the chemical reactiondiphosphate + a purine nucleoside phosphate + a purine mononucleotideThus the two substrates of this enzyme are diphosphate and purine nucleoside whereas its two products are phosphate and purine mononucleotide.This enzyme belongs to the family of transferases specifically those transferring phosphorus-containing groups (phosphotransferases) with an alcohol group as acceptor.