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Creatine kinase (CK) — also known as creatine phosphokinase (CPK) or phospho-creatine kinase — is an enzyme (EC 2.7.3.2) expressed by various tissues and cell types.
C 2558 (OTTO) Creatine phosphokinase, from rabbit muscle, Type I, salt-free, lyophilized powder, ≥150 units/mg protein Cas 9001-15-4 - used as a component of ATP-generating systems.