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- W1994504646 abstract "Metal-catalysed radical oxidation of diacyl-glycerophosphatidylcholines (GPC) with ω-6 acyl polyunsaturated fatty acids (PAPC, palmitoyl-arachidonoyl-glycerophosphatidylcholine and PLPC, palmitoyl-lineloyl-glycerophosphatidylcholine) was studied. Free radical oxidation products were trapped by spin trapping with 5,5-dimethyl-1-pyrrolidine-N-oxide (DMPO) and identified by electrospray mass spectrometry (ES-MS). The spin adducts of oxidised GPC containing one and two oxygen atoms and one and two DMPO molecules were observed as doubly charged ions. Structural characterisation by tandem mass spectrometry (MS/MS) of these ions revealed product ions corresponding to loss of the acyl chains (sn-1-palmitoyl and sn-2-oxidised spin adduct of lineloyl or arachidonoyl), loss of the spin trap (DMPO) and product ions attributed to oxidised sn-2 fatty acid spin adduct (lineloyl and arachidonoyl). Product ions formed by homolytic cleavages near the spin trap and also from 1,4 hydrogen elimination cleavages involving the hydroxy group in the sn-2 fatty acid spin adduct allowed to infer the nature of the radical. Altogether, the presence of GPC hydroxy-alkyl/DMPO and hydroxy-alkoxyl/DMPO spin adducts was proposed." @default.
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- W1994504646 date "2007-01-01" @default.
- W1994504646 modified "2023-09-28" @default.
- W1994504646 title "Identification of free radicals of glycerophosphatidylcholines containing ω-6 fatty acids using spin trapping coupled with tandem mass spectrometry" @default.
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- W1994504646 doi "https://doi.org/10.1080/10715760601118353" @default.
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