Creatine kinase (CK) (EC 2.7.3.2) is also known as creatine phosphokinase, which mainly exists in heart,
muscle and brain. It can reversibly catalyze the trans-phosphoryl reaction between creatine and ATP. It is
an important kinase directly related to cell energy transport, muscle contraction and ATP regeneration.
CK catalyzes creatine phosphate and ADP to generate creatine and ATP, hexokinase catalyzes ATP and
glucose to generate glucose-6-phosphate, and glucose-6-phosphate dehydrogenase catalyzes glucose-6-
phosphate and NADP+ to generate NADPH, resulting in an increase of 340 nm light absorption value,
which is used to express CK enzyme activity.
Reagents and Equipment Required but Not Provided
Scales, low temperature centrifuge, constant temperature water bath, spectrophotometer, 1 mL quartz
cuvette and distilled water.