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D7876 Sigma

Diamine Oxidase from porcine kidney

≥0.05 unit/mg solid

Synonym: Amine:oxygen oxidoreductase (deaminating) (pyridoxal-containing)



Related Categories 1.4.x.x Acting on CH-NH2, 1.x.x.x Oxidoreductases, Biochemicals and Reagents, Cell Biology, Enzyme Class Index,
solubility   100 mM sodium phosphate buffer, pH 7.2: soluble 10 mg/mL
foreign activity   monoamine oxidase (benzylamine substrate) ≤1%
storage temp.   −20°C



1, 5, 10 g in poly bottle

250 mg in poly bottle

Unit Definition

One unit will oxidize 1.0 μmole of putrescine per hr at pH 7.2 at 37 °C.


Diamine oxidase from porcine kidney has been used in a study to investigate a luminescence-based test for determining ornithine decarboxylase activity. Diamine oxidase from porcine kidney has also been used in a study to investigate N-linked oligosaccharide structures in diamine oxidase.

Biochem/physiol Actions

Diamine oxidase from porcine kidney is a homodimer consisting of 2 equal subunits with a molecular weight of 87 kDa each. Each subunit contains one molecule of pyridoxal phosphate and one atom of copper. The molecular mass of the enzyme is found to be 170 kDa. The enzyme is a glycoprotein containing 5% hexose, 3.3% glucosamine, 2.6% N-acetylglucosamine, and 0.25% N-acetylneuraminic acid. The enzyme exhibits a high affinity for concanavalin A. It catalyzes the oxidation of monoamines, diamines, and histamine to aldehydes, ammonia, and hydrogen peroxide. Optimum pH with cadverine and histamine as substrates is found to be 6.3-7.4. The enzyme is classified as a copper amine oxidase and it is a key enzyme in nitrogen metabolism. It is inhibited by diethyldithiocarbamate, phenylhydrazine, semicarbazide, cyanide, isonicotinic acid hydrazide.

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Safety Information

NONH for all modes of transport
WGK Germany 
Protocols & Articles


Enzymatic Assay of Diamine Oxidase (E.C. No.

Replacing OP SPPUTR01. New document number assigned to conform to current document numbering system.
Keywords: Carcinogens, Extinction coefficient

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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