An introduction to free radical biochemistry
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ID: 296878
1993
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Abstract
Free radicals are chemical species possessing an unpaired electron that can be considered as fragments of molecules and which are generally very reactive. They are produced continuously in cells either as accidental by-products of metabolism or deliberately during, for example, phagocytosis. The most important reactants in free radical biochemistry in aerobic cells are oxygen and its radical derivatives (superoxide and hydroxyl radical), hydrogen peroxide and transition metals. Cells have developed a comprehensive array of antioxidant defences to prevent free radical formation or limit their damaging effects. These include enzymes to decompose peroxides, proteins to sequester transition metals and a range of compounds to 'scavenge' free radicals. Reactive free radicals formed within cells can oxidise biomolecules and lead to cell death and tissue injury. Establishing the involvement of free radicals in the pathogenesis of a disease is extremely difficult due to the short lifetimes of these species.
| Reference Key |
openalex_W2260835883
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|---|---|
| Authors | Kevin H. Cheeseman, T. F. Slater |
| Journal | british medical bulletin |
| Year | 1993 |
| DOI |
10.1093/oxfordjournals.bmb.a072625
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| URL | |
| Keywords | Keywords not found |
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