part of part of has part has part has_part characteristic of has modifier creatine kinase complex abnormal circulating creatine kinase level decreased circulating creatine kinase level decreased circulating CK level decreased circulating creatine phosphokinase level decreased circulating CPK level 2010-03-29T12:56:51Z reduced circulating CK level MP:0010091 a reduction in the concentration in the blood of an enzyme that catalyzes the reversible transfer of creatine to phosphocreatine decreased circulating creatinine kinase level reduced circulating creatinine kinase level reduced circulating creatine kinase level MPheno.ontology csmith reduced circulating phospho-creatine kinase level reduced circulating CPK level reduced circulating creatine phosphokinase level decreased circulating phospho-creatine kinase level There is ambiguity in the literature regarding the terms creatinine kinase and creatine kinase. Most resources insist that creatine kinase is correct. See PMID:17174558 and PMID:14624200 not to mention Wikipedia. Creatine kinase is an enzyme found in the heart, brain, skeletal muscle, and other tissues. Increased amounts of CK are released into the blood when there is muscle damage. The small amount of CK that is normally in the blood comes primarily from skeletal muscles. decreased circulating enzyme level decreased creatine kinase level abnormal decreased amount blood