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Identification of novel nonmethylene-interrupted fatty acids, 7E,13E-20∶2, 7E,13E,17Z-20∶3, 9E,15E,19Z-22∶3, and 4Z,9E,15E,19Z-22∶4, in ophiuroidea (Brittle star) lipids

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Lipids

Abstract

Fatty acids of Ophiuroidea (brittle star) Ophiura sarsi have been investigated by gas-liquid chromatography (GLC). About 2–13% of four unidentified fatty acids were found in total fatty acids from a sample caught at a depth of 1,100 m. Structural analyses were undertaken after partial hydrogenation of their concentrates with hydrazine hydrate and subsequent isolation of the monoenoate products by argentation thin-layer chromatography. The structures of the unidentified fatty acids were determined as 7E,13E-eicosadienoic (20∶2), 7E,13E,17Z-eicosatrienoic (20∶3), 9E,15E,19Z-docosatrienoic (22∶3), and 4Z,9E,15E,19Z-docosatetraenoic (22∶4) acids by gas chromatography-mass spectrometry of dimethyl disulfide adducts and GLC of the monoenoates on a polar column. These fatty acids belong to a family of nonmethylene-interrupted (NMI) polyunsaturated fatty acids frequently observed in marine invertebrates and conifer seeds. As far as the authors know, however, these NMI fatty acid types with mixed geometry of ethylenic bonds have not been reported previously.

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Abbreviations

DMDS:

dimethyl disulfide

ECL:

equivalent chain length

GC-MS:

gas chromatography-mass spectrometry

GLC:

gas-liquid chromatography

NMI fatty acids:

nonmethylene-interrupted fatty acids

TLC:

thin-layer chromatography

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Authors and Affiliations

  1. Toyama Prefectural Fisheries Research Institute, Namerikawa, 931-8536, Toyama, Japan

    Ryo Tsujimoto

  2. Toyama Food Research Institute, 939-8153, Toyama, Toyama, Japan

    Ken-ichi Kawasaki

  3. Laboratory of Bioresources Chemistry, Division of Marine Biosciences, Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-cho, 041-8611, Hakodate, Japan

    Daisuke Sato & Yasuhiro Ando

Authors
  1. Daisuke Sato
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  2. Yasuhiro Ando
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  3. Ryo Tsujimoto
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  4. Ken-ichi Kawasaki
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Correspondence to Yasuhiro Ando.

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Sato, D., Ando, Y., Tsujimoto, R. et al. Identification of novel nonmethylene-interrupted fatty acids, 7E,13E-20∶2, 7E,13E,17Z-20∶3, 9E,15E,19Z-22∶3, and 4Z,9E,15E,19Z-22∶4, in ophiuroidea (Brittle star) lipids. Lipids 36, 1371–1375 (2001). https://doi.org/10.1007/s11745-001-0854-x

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  • DOI: https://doi.org/10.1007/s11745-001-0854-x

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