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superoxide dismutase

superoxide dismutase (SOD) A widely distributed enzyme that removes the superoxide radical (O2·), with the formation of molecular oxygen and hydrogen peroxide, in the following reaction: O2· + O2· + 2H+ → O2 + H2O2

The hydrogen peroxide formed is removed by the action of catalase. The superoxide anion, which damages tissues, is a free radical formed by the partial reduction of molecular oxygen; it is produced during the metabolic breakdown of various toxins (including drugs and chemical poisons) and as part of the immune response to the presence of bacteria and virus-infected cells.

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"superoxide dismutase." A Dictionary of Biology. . Retrieved September 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/superoxide-dismutase

superoxide dismutase

superoxide dismutase (SOD) Enzyme that converts the superoxide radical to hydrogen peroxide; sometimes promoted as having useful antioxidant properties, but would be ineffective taken by mouth since it is a protein and will be digested.

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"superoxide dismutase." A Dictionary of Food and Nutrition. . Encyclopedia.com. 22 Sep. 2017 <http://www.encyclopedia.com>.

"superoxide dismutase." A Dictionary of Food and Nutrition. . Encyclopedia.com. (September 22, 2017). http://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/superoxide-dismutase

"superoxide dismutase." A Dictionary of Food and Nutrition. . Retrieved September 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/superoxide-dismutase