title: Novel Odd-Chain Fatty Acids with a Terminal Double Bond in Ovaries of the Limpet Cellana toreuma.
abstract: Our previous study characterized highly diverse dienoic fatty acids (FA), in particular an uncommon non-methylene-interrupted (NMI) FA, in the ovaries of the Japanese limpet Cellana toreuma belonging to the archaeogastropods, but many minor chemically unidentified FA remain. In this study, among previously unidentified FA (less than 0.1% of total FA), four novel NMI FA with a terminal double bond [7,18-nonadecadienoic (19:2Δ7,18), 11,18-nonadecadienoic (19:2Δ11,18), 7,20-heneicosadienoic (21:2Δ7,20), and 11,20-heneicosadienoic (21:2Δ11,20) acids] were found, along with known 14-pentadecenoic (15:1Δ14), 16-heptadecenoic (17:1Δ16), and 9,18-nonadecadienoic (19:2Δ9,18) acids, based on capillary GC-MS of their methyl esters, 3-pyridylcarbinol derivatives, and argentation thin-layer chromatography. From our findings, possible biosynthetic pathways for the novel FA are discussed.
authors.affiliation: Bioscience Laboratory, Miyako College, Iwate Prefectural University, 1-5-1 Kanan, Miyako, Iwate, 027-0031, Japan. ajoe@iwate-pu.ac.
authors.forename: Hideki
authors.initials: H
authors.lastname: Kawashima
authors.affiliation: Department of Food Science and Human Nutrition, Faculty of Human Life Sciences, Fuji Women's University, Ishikari, 061-3204, Japan.
authors.forename: Masao
authors.initials: M
authors.lastname: Ohnishi
mesh_terms: D000818:Animals; D053898:Biosynthetic Pathways; D005227:Fatty Acids / Q000032:analysis* / Q000737:chemistry; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D049851:Gastropoda / Q000378:metabolism*; D010053:Ovary / Q000378:metabolism*
chemical_list: D005227:Fatty Acids
keywords: Heneicosadienoic acid; Limpet; Non-methylene-interrupted fatty acid; Nonadecadienoic acid; Ovary