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Original Article

What is Unique About Superoxide Toxicity as Compared to Other Biological Reductants? — A Hypothesis

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Pages 231-236 | Received 01 Jul 1987, Accepted 06 Aug 1987, Published online: 07 Jul 2009
 

Abstract

Usually the toxicity of superoxide is attributed lo its ability to reduce metal ions and subsequently reoxidation of the metal by hydrogen peroxide yields deleterious oxidizing species. As many other nontoxic biological reductants reduce metal compounds, we suggest that part of the mechanism of superoxide toxicity results from its ability to oxidize metal ions bound to biological targets, which subsequently degrade the target via an intramolecular electron Transfer reaction.

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