abnormal enzyme/ coenzyme level abnormal creatine kinase activity MP:0020307 MPheno.ontology abnormal ATP:creatine N-phosphotransferase activity abnormal ATP:creatine phosphotransferase activity abnormal BB-CK activity abnormal CK activity abnormal CK-BB activity abnormal CK-MB activity abnormal CK-MM activity abnormal CKMiMi activity abnormal MB-CK activity abnormal MM-CK activity abnormal Mi-CK activity abnormal MiMi-CK activity abnormal adenosine triphosphate-creatine transphosphorylase activity abnormal creatine phosphokinase activity abnormal creatine phosphotransferase activity abnormal phosphocreatine kinase activity altered ability of to catalyze the reaction: ATP + creatine = N-phosphocreatine + ADP + 2 H(+).