Merck, A5168-1KU, Adenosine Deaminase from bovine spleen

General description
Molecular weight: 32.5-33 kDa

pI: 4.85
Adenosine deaminase/ADA is an enzyme, that is mainly present in lymphocytes and monocytes.
Application
Adenosine deaminase is useful in various molecular biology assays, such as glycerol release assays . Adenosine deaminase is a potential target for treatments of combined immunodeficiency disease.
Adenosine Deaminase from bovine spleen has been used to metabolize adenosine triphosphate (ATP) and adenosine to an inactive form (inosine). It has also been used to as an additive in KRH (Krebs−Ringer solution buffered with Hepes, containing CaCl2) medium in order to remove exogenous adenosine for cyclic adenosine monophosphate (cAMP) assay.
Biochem/physiol Actions
Adenosine deaminase is a purine catabolic enzyme which catalyzes the deamination of adenosine and 2′-deoxyadenosine with approximately equal specificity. It is ubiquitous in mammalian tissue, and deficiency in adenosine deaminase has been associated with severe combined immunodeficiency disease.
Adenosine deaminase/ADA can be used as an important marker to identify tuberculous pleural effusion. The activity of ADA is usually high in liver disease, tuberculosis, typhoid, infective mononucleosis and several malignancies.
Physical form
Suspension in 3.2 M (NH₄)₂SO₄, 0.01 M potassium phosphate, pH 6.0
Analysis Note
Protein determined by biuret.
Other Notes
One unit will deaminate 1.0 μmole of adenosine to inosine per min at pH 7.5 at 25 °C.