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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Spin trapping of free radicals formed during peroxidation of sarcolemmal membranes (SLM).

The generation of free radicals in a superoxide (O2-.) driven Fe+3 catalysed reactions with isolated myocytic sarcolemma using electron spin resonance was investigated. Incubation of highly purified canine myocytic sarcolemma in the presence of the spin trap, 2-methyl-2-nitrosopropane (MNP), followed by the addition of dihydroxyfurmarate (DHF) and Fe+3-ADP resulted in the generation and detection of radical adducts of this spin trap. Spin trapping of the alkyl radicals with 2-methyl-2-nitrosopropane led to the identification of methyl radical adduct following exposure to DHF/Fe+3-ADP. With sarcolemma and the alkyl nitroso compound, the only radical product trapped was the methyl radical formed by beta-scission of alkoxyl radical. The participation of hydroperoxide-derived radicals in this system verified that the decomposition of unsaturated hydroperoxy fatty acid does proceed via a free radical mechanism.[1]


  1. Spin trapping of free radicals formed during peroxidation of sarcolemmal membranes (SLM). Arroyo, C.M., Mak, I.T., Weglicki, W.B. Free Radic. Res. Commun. (1989) [Pubmed]
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