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S9511 Sigma

Superoxide Dismutase from canine erythrocytes

lyophilized powder, 2,000-6,000 units/mg protein

Synonym: SOD, Superoxide: superoxide oxidoreductase

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Description

Analysis Note

For assay method, see McCord, J.M. and Fridovich,I., J. Biol. Chem., 244, 6049 (1969).

Biochem/physiol Actions

Catalyzes the dismutation of superoxide radicals to hydrogen peroxide and molecular oxygen. Plays a critical role in the defense of cells against the toxic effects of oxygen radicals. Competes with nitric oxide (NO) for superoxide anion (which reacts with NO to form peroxynitrite), thereby promoting the activity of NO.1 SOD has also been shown to suppress apoptosis in cultured rat ovarian follicles, neural cell lines and transgenic mice.2,3

Unit Definition

One unit will inhibit reduction of cytochrome c by 50% in a coupled system with xanthine oxidase at pH 7.8 at 25 °C in a 3.0 mL reaction volume. Xanthine oxidase concentration should produce an initial ΔA550 of 0.025 ± 0.005 per min.

Physical form

Lyophilized powder containing potassium phosphate buffer salts

Price and Availability


All labs need water
Safety & Documentation

Safety Information

WGK Germany 
3

Documents

Certificate of Analysis

Protocols & Articles

Protocols

Enzymatic Assay of Superoxide Dismutase

This procedure applies to all products that have a specification for superoxide dismutase activity by enzymatic determination.
Keywords: Catalysis, Reductions

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
15

References

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