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- W1528921211 abstract "Detergent-solubilized and partially purified soybean peroxygenase was shown to actively catalyze, in the presence of alkylhydroperoxides as co-substrates, the epoxidation of mono- and polyunsaturated fatty acids such as oleic and linoleic acids. Octadecenoic acids were found to be better substrates than shorter mono-unsaturated fatty acids (C16:1 or C14:1), but the position of their double bond (at positions 6, 9, or 11) had little effect on the rates of epoxidation. The peroxygenase exhibits a strong stereospecificity since octadecenoic acids with double bonds in trans-configuration were not epoxidized at detectable rates. Oxidation of linoleic acid yielded the two positional monoepoxide isomers and, as the minor product, the diepoxide. An important regioselectivity was, however, observed in this case; i.e. the unsaturation at position 9,10 was epoxidized preferentially to that at 12, 13. Oxidation of oleic acid in the presence of 18O-labeled hydroperoxy-linoleic acid revealed an incorporation of about 80% of the label into the epoxide ring. Products similar to those formed by the peroxygenase by epoxidation of unsaturated free fatty acids such as linoleic acid have been described as important metabolites (leukotoxins) in the defense of plants, e.g. in fungal agressions. This aspect underlines the physiological relevance of this new and potent catalytic activity of the peroxygenase." @default.
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- W1528921211 date "1990-08-01" @default.
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- W1528921211 title "Efficient epoxidation of unsaturated fatty acids by a hydroperoxide-dependent oxygenase." @default.
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- W1528921211 doi "https://doi.org/10.1016/s0021-9258(19)38243-2" @default.
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