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- W2064214509 abstract "Homogenates of tomato fruits catalysed the enzymic conversion of linoleic and linolenic acids (but not oleic acid) to C6 aldehydes in low (3–5%) molar yield. Hexanal was formed from linoleic acid; cis-3-hexenal and smaller amounts of trans-2-hexenal were formed from linolenic acid. With the fatty acids as substrates, the major products were fatty acid hydroperoxides (50–80% yield) and the ratio of 9- to 13-hydroperoxides as isolated from an incubation with linoleic acid was at least 95:5 in favour of the 9-hydroperoxide isomer. When the 9- and 13-hydroperoxides of linoleic acid were used as substrates with tomato homogenates, the 13-hydroperoxide was readily cleaved to hexanal in high molar yield (60%) but the 9-hydroperoxide isomer was not converted to cleavage products. Properties of the hydroperoxide cleavage system are described. The results indicate that the C6 aldehydes are formed from C18 polyunsaturated fatty acids in a sequential enzyme system involving lipoxygenase (which preferentially oxygenates at the 9-position) followed by a hydroperoxide cleavage system which is, however, specific for the 13-hydroperoxy isomers." @default.
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- W2064214509 date "1977-01-01" @default.
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- W2064214509 title "Lipoxygenase-mediated cleavage of fatty acids to carbonyl fragments in tomato fruits" @default.
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- W2064214509 doi "https://doi.org/10.1016/0031-9422(77)80060-5" @default.
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