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1. a subclass of the transferases, comprising the enzymes that catalyze the transfer of a high-energy group from a donor (usually ATP) to an acceptor, and named, according to the acceptor, as creatine kinase, fructokinase, etc.
2. an enzyme that activates a zymogen, named, according to its source, such as enterokinase, streptokinase, etc.


A phosphotransferase or a kinase.


see kinase.
References in periodicals archive ?
6 Abbreviations: WBC, white blood cells; AST, aspartate aminotransferase; CPK, creatinine phosphokinase.
Creatine phosphokinase (CPK), lactate dehydrogenase (LDH), superoxide dismutase (SOD) and malondialdehyde (MDA) activity assay kits were purchased from Jiancheng Reagent Company (Nanjing, China).
CPKMB = creative phosphokinase-MB; CPKMBRI = creative phosphokinase-MB Index; TCPK = total creative phosphokinase.
In many children additional tests included: serum creatine phosphokinase (CPK), lactic dehydrogenase (LDH), ammonia and bilirubin; presence/titres of IgM class antibodies against a number of viruses (known to be associated with acute brain disease) and Leptospira species; blood, CSF and urine bacterial culture; viral isolation studies on serum, CSF, urine and visceral specimens.
1), a bicarbonate level of 10 mmol/L, and elevation of creatine phosphokinase level to 75 062 U/L.
The most common side effects were elevated CPK (creatinine phosphokinase, an enzyme that is present in muscle tissue and is a marker for breakdown of muscle tissue), upper respiratory tract infection, fatigue, headache, abdominal pain and cough.
Researchers witnessed lower levels of creatine phosphokinase (CPK), an indicator of muscle injury, in the blood.
Red and white blood cell count, serum electrolytes, creatinine, C-reactive protein, creatine phosphokinase and troponin-T were normal, lactate-dehydrogenase was 335 U/L (normal: <248) and INR was 2.
This study reports the case of a woman with severe asthenia and very high blood levels of creatine phosphokinase and lactate dehydrogenase.
An improved procedure for serum creatine phosphokinase determination.
His erythrocyte sedimentation rate (Westergren) was 32 mm/h, his creatinine phosphokinase level was 345 IU/L (normal < 157 IU/L), and his antinuclear antibody titer was positive at 1:80.
1954 Kuby develops the clinical lab method for serum creatine phosphokinase activity; A.

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