abnormal creatine kinase level decreased creatine kinase level MP:0020281 MPheno.ontology decreased ATP:creatine N-phosphotransferase level decreased ATP:creatine phosphotransferase level decreased BB-CK decreased CK decreased CK-BB decreased CK-MB decreased CK-MM decreased CKMiMi decreased MB-CK decreased MM-CK decreased Mi-CK decreased MiMi-CK decreased adenosine triphosphate-creatine transphosphorylase level decreased creatine phosphokinase level decreased creatine phosphotransferase level decreased level of the enzyme that catalyzes the reversible transfer of creatine to phosphocreatine decreased phosphocreatine kinase level