Serum Creatine PhosphoKinase-3 (CPK-3) is elevated in-
Musculardystrophy CreatineKinase(CK)or CreatinePhosphokinase(CPK)catalysestheinterconversionof phosphocreatineto creatine. CPKexistsasthreeisoenzymes.Eachisoenzymeisa dimercomposedoftwosubunits- M(muscle)orB (Brain)orboth Isoenzyme SubUnit Tissueoforigin CPK1 BB Brain CPK2 MB Hea CPK3 MM SkeletalMuscle
Muscular dystrophy
Myocardial infarction
Alcoholic cirrhosis
Brain tumours