superoxide

superoxide
An oxygen free radical, O2−, which is toxic to cells.
- s. dismutase (SOD) an enzyme that catalyzes the dismutation reaction, 2O2 − + 2H+ → H2O2 + O2; there are three isozymes of SOD: an extracellular form (ECSOD) that contains copper and zinc, a cytoplasmic form that also contains copper and zinc, and a mitochondrial form that contains manganese; a deficiency of SOD is associated with amyotrophic lateral sclerosis.

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su·per·ox·ide -'äk-.sīd n any of various toxic oxygen-containing free radicals esp the monovalent anion O2- or a compound containing it <potassium \superoxide KO2>

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su·per·ox·ide (soo″pər-okґsīd) any compound containing the highly reactive superoxide radical, O2−, which is produced by reduction of molecular oxygen in many biological oxidations; this highly toxic free radical is continuously removed by the enzyme superoxide dismutase.

Medical dictionary. 2011.

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  • superoxide — noun Date: circa 1847 the monovalent anion O2 or a compound containing it < potassium superoxide KO2 > …   New Collegiate Dictionary

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  • superoxide dismutase — superoxide dis·mu·tase dis myü .tās n a metal containing antioxidant enzyme that reduces potentially harmful free radicals of oxygen formed during normal metabolic cell processes to oxygen and hydrogen peroxide abbr. SOD * * * su·per·ox·ide… …   Medical dictionary

  • superoxide dismutase — superoxide dismutase. См. супероксиддисмутаза. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Superoxide dismutase — For other senses of the term SOD/Sod, see Sod (disambiguation). Superoxide dismutase Structure of a human Mn superoxide dismutase 2 tetramer.[1] …   Wikipedia

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