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 — Su per*ox ide, n. (Chem.) See {Peroxide}. [Obs.] [1913 Webster] …   The Collaborative International Dictionary of English

  • superoxide — [so͞o΄pəräk′sīd] n. a compound containing the paramagnetic, monovalent, negative free radical O2 …   English World dictionary

  • Superoxide — Lewis electron configuration of superoxide. The six outer shell electrons of each oxygen atom are shown in black; one electron pair is shared (middle); the unpaired electron is shown in the upper left and the additional electron conferring a… …   Wikipedia

  • superoxide — noun 1. a metallic oxide containing the univalent anion O2 • Hypernyms: ↑oxide 2. the univalent anion O2 much of the O2 supporting cellular respiration is reduced to the superoxide anion O2 • Syn: ↑superoxide anion • Hypernyms: ↑ …   Useful english dictionary

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

  • superoxide — superoksidas statusas T sritis chemija formulė MO₂ atitikmenys: angl. hyperoxide; superoxide rus. гипероксид; надперекись ryšiai: sinonimas – hiperoksidas sinonimas – dioksidas (1–) …   Chemijos terminų aiškinamasis žodynas

  • 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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