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M3003 Sigma

Myokinase from rabbit muscle

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

Synonym: ATP: AMP phosphotransferase, Adenylate Kinase



Related Categories 2.7.x.x Phosphorus containing groups, 2.x.x.x Transferases, Biochemicals and Reagents, Cell Biology, Enzyme Class Index,
form   ammonium sulfate suspension
foreign activity   3-phosphoglyceric phosphokinase ≤0.05%
  lactic dehydrogenase and pyruvate kinase ≤0.01%
storage temp.   2-8°C


General description

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

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


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

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.

Price and Availability

All labs need water

Biomedical Applications
Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Protocols & Articles


Ammonium Sulfate Suspensions - Technical Note

Note that for an ammonium sulfate suspension, most of the enzyme will be in solid form. It is likely that only negligible amounts of enzyme will be in the ammonium sulfate solution.
Keywords: Enzyme activity

Related Content

Enzymes & Proteins

Application Index | Enzyme Index | Substrate Index | Inhibitor Index | Cofactor Index | Lectin Index
Keywords: Cell signaling, Diagnostic, Drug discovery, Molecular biology

Peer-Reviewed Papers


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