superoxide dismutase

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Related to superoxide: hydroxyl radical, superoxide dismutase

superoxide dismutase

[¦sü·pər‚äk‚sīd ′diz·myü‚tās]
(organic chemistry)
An enzymatic antioxidant that removes the potentially toxic superoxide ion (O2-) by disproportionating it to O2 and hydrogen peroxide (H2O2).
References in periodicals archive ?
The mean serum superoxide oxide dismutase in cases and controls was 62.
A central molecule in ROS is the superoxide anion, which is generated when a single electron is transferred to dioxygen.
Nashef, scientists will be able to use superoxide ions generated in ionic solvents to break down or synthesize organic compounds in numerous new applications.
Nitric oxide synthase and superoxide dismutase gene polymorphisms in Behget disease.
Marklund, "Human copper-containing superoxide dismutase of high molecular weight," Proceedings of the National Academy of Sciences of the United States of America, vol.
was used with slight changes in order to create the superoxide radicals [9].
The deduced amino acid sequence has a 21 aa signal peptide sequence in the N-terminus, and contained a manganese superoxide dismutase domain (DVWEHAYY), four conserved amino acids responsible for binding manganese H48, H96, D180 and H184 and two N-glycosylation sites NHT and, NLS.
The one most to the point at hand showed the scavenging ability of thiamine for superoxide (generated by the xanthine oxidase/hypoxanthine system) to be dose dependent and able to be driven to completion under the in vitro experimental conditions.
All the results indicate that different fractions from lactic acid bacteria have various capabilities on reducing power scavenging superoxide anion free radicals ability and total antioxidant capacity.
If L-arginine (the amino acid precursor to nitric oxide) is not effectively converted to nitric oxide, uncoupling will result, and superoxide will instead be produced, increasing chances of peroxynitrite formation (Sankaralingam, 2006).
Not only, the superoxide anion reduces ferric cations to ferrous cations [7]: