Tags: Enzyme.
In enzymology a phosphoribokinase (EC 2.7.1.18) is an enzyme that catalyzes the chemical reactionATP + D-ribose 5-phosphate ADP + D-ribose 15-bisphosphateThus the two substrates of this enzyme are ATP and D-ribose 5-phosphate whereas its two products are ADP and D-ribose 15-bisphosphate.This enzyme belongs to the family of transferases specifically those transferring phosphorus-containing groups (phosphotransferases) with an alcohol group as acceptor.