Journal
JOURNAL OF APPLIED PHYCOLOGY
Volume 18, Issue 3-5, Pages 409-412Publisher
SPRINGER
DOI: 10.1007/s10811-006-9038-6
Keywords
Laminaria angustata; lipoxygenase; fatty acid hydroperoxide lyase; n-hexanal; 3Z-nonenal; 2E-nonenal
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2E-Nonenal and n-hexanal are the major and minor flavor compounds in the edible brown alga, Laminaria angustata, respectively. They are believed to characterize the flavor of this alga. However the metabolism of the two compounds is not precisely known. The pathways were clarified by elucidation of the intermediate structure through purification of the intermediate compounds from an enzymatic reaction and identification using HPLC and GC-MS techniques. Formation of n-hexanal, 3Z-nonenal and 2E-nonenal are proposed to be via two cascades from unsaturated fatty acids. They are C18:2(n-6), linoleic acid cascade and C20:4(n-6), arachidonic acid cascade through their hydroperoxides as intermediates by the lipoxygenase/fatty acid hydroperoxide lyase pathway.
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