blood enzyme activity level blood creatine kinase activity level 2014-03-11T14:12:54Z CMO:0002242 EFO:0004534 JSmith The amount of enzymatic activity of creatine kinase (CK) enzyme in a specified sample of blood. CK catalyses the reversible transfer of phosphate between ATP and various phosphogens such as creatine phosphate. Blood CK level is used as an enzymatic marker for myocardial infarction, rhabdomyolysis and acute renal failure. VT:1000047 blood CK activity level blood CPK activity level blood creatine phosphokinase activity level blood phosphocreatine kinase activity level clinical_measurement_ontology creatine kinase measurement