CK

CK creatine kinase.

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creatine kinase (CK),

an enzyme of the transferase class in muscle, brain, and other tissues. It catalyzes the transfer of a phosphate group from adenosine triphosphate to creatine, producing adenosine diphosphate and phosphocreatine. The reaction stores energy in muscle and brain tissue. Also called creatine phosphokinase. See also Duchenne's muscular dystrophy.

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creatine [kre´ah-tin]

a nonprotein substance synthesized in the body from three amino acids: arginine, glycine (aminoacetic acid), and methionine. Creatine readily combines with phosphate to form phosphocreatine, or creatine phosphate, which is present in muscle, where it serves as the storage form of high-energy phosphate necessary for muscle contraction.

creatine kinase an enzyme catalyzing the transfer of a phosphate group from phosphocreatine to ATP. It has three isoenzymes: CK₁, found primarily in the brain; CK₂, found in the myocardium; and CK₃, found in both skeletal muscle and the myocardium. The presence of CK₂ in the blood is strongly indicative of a recent myocardial infarction; it is present until about 72 hours after the attack.

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CK

creatine kinase.

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CK

Creatinine phosphokinase, see there