creatine kinase

creatine kinase   n.  An enzyme present in muscle, brain, and other tissues of vertebrates that catalyzes the reversible conversion of ADP and phosphocreatine into ATP and creatine.

Main Entry: creatine kinase
Function: noun
: any of three isoenzymes found especially in vertebrate skeletal and myocardial muscle and the brain that catalyze thetransfer of a high-energy phosphate group from phosphocreatine to ADP with the formation of ATP and creatine and typically occur in elevated levels in the blood following injury to brain or muscletissue

creatine kinase n.
An enzyme present in muscle, brain, and other tissues of vertebrates that catalyzes the reversible conversion of ADP and phosphocreatine into ATP and creatine.