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Myokinase from rabbit muscle

ammonium sulfate suspension, 1,500-3,000 units/mg protein (biuret)

ATP: AMP phosphotransferase, Adenylate Kinase
CAS Number:
Enzyme Commission number:
EC Number:
MDL number:

biological source

rabbit muscle

Quality Level


ammonium sulfate suspension

specific activity

1,500-3,000 units/mg protein (biuret)

mol wt

21 kDa

foreign activity

3-phosphoglyceric phosphokinase ≤0.05%
lactic dehydrogenase and pyruvate kinase ≤0.01%

storage temp.


General description

Myokinase is an enzyme that can be found in skeletal muscle and acts as a phosphotransferase agitator. [63]


Myokinase has been used in a study to assess its reaction with the mercurials p-hydroxymercuribenzoate and p-mercuribenzenesulfonate. [84] It has also been used in a study to investigate the ligand-binding properties of its peptide fragments. [12]

Biochem/physiol Actions

Myokinase is a key enzyme involved with adenine nucleotide metabolism. The action of myokinase insures that the adenine nucleotides (ATP, ADP, and AMP) are maintained in equilibrium in the cytosol.
Myokinase catalyzes the following reaction:ADP + ADP → ATP + AMP
Rabbit muscle myokinase can be inactivated by treatment with dithiobis-(2-nitrobenzoic) acid which alters methionine residues critical to myokinase activity. [87]

Unit Definition

One unit will convert 2.0 μmoles of ADP to ATP+AMP per min at pH 7.6 at 37°C.

Physical form

Suspension in 3.2 M (NH4)2SO4 solution containing 0.001 M EDTA, pH 6.0

Storage Class Code

12 - Non Combustible Liquids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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