Tags: Enzyme.
In enzymology a ribose 15-bisphosphate phosphokinase (EC 2.7.4.23) is an enzyme that catalyzes the chemical reactionATP + ribose 15-bisphosphate ADP + 5-phospho-alpha-D-ribose 1-diphosphateThus the two substrates of this enzyme are ATP and ribose 15-bisphosphate whereas its two products are ADP and 5-phospho-alpha-D-ribose 1-diphosphate.This enzyme belongs to the family of transferases specifically those transferring phosphorus-containing groups (phosphotransferases) with a phosphate group as acceptor.