ki·nase (kī'nās', -nāz', kĭn'ās', -āz') n. Any of various enzymes that catalyze the transfer of a phosphate group from a donor, such as ADP or ATP, to an acceptor.
Main Entry: ki·nase Pronunciation: 'kI-"nAs, -"nAz Function: noun : an enzyme that catalyzes the transfer of phosphate groups from a high-energyphosphate-containing molecule (as ATP or ADP) to a substrate called also phosphokinase