How many creatine kinase "isoenzymes" are there and what is their clinical significance?
D003402:Creatine Kinase / Q000097:blood*; D004591:Electrophoresis, Polyacrylamide Gel; D014644:Genetic Variation; D006801:Humans; D007527:Isoenzymes; D046911:Macromolecular Substances
D007527:Isoenzymes; D046911:Macromolecular Substances; D003402:Creatine Kinase