what is creatinine kinase
Creatine kinase (CK) or Creatine phosphokinase (CPK) is an enzyme produced by the muscles. There are three types of CK produced by major muscle groups: the brain, the heart, and the skeletal muscle tissue.When muscle cells are injured or diseased, enzymes leak out of the cells and enter the bloodstream.reatine kinase (CK) or Creatine phosphokinase (CPK) is an enzyme produced by the muscles. There are three types of CK produced by major muscle groups: the brain, the heart, and the skeletal muscle tissue.