NEW BRANCHED-CHAIN FATTY-ACIDS FROM THE SENEGALESE GORGONIAN LEPTOGORGIA-PICCOLA (WHITE AND YELLOW MORPHS)

被引:24
作者
MIRALLES, J
BARNATHAN, G
GALONNIER, R
SALL, T
SAMB, A
GAYDOU, EM
KORNPROBST, JM
机构
[1] UNIV NANTES,FAC PHARM,GRP SMAB,F-44035 NANTES 01,FRANCE
[2] UNIV CHEIKH ANTA DIOP,FAC SCI,DEPT BIOL VEGETAL,DAKAR,SENEGAL
[3] UCAD,DEPT CHIM,DAKAR,SENEGAL
[4] UNIV AIX MARSEILLE 3,FAC SCI & TECH ST JEROME,PHYTOCHIM LAB,MARSEILLE,FRANCE
关键词
D O I
10.1007/BF02536305
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Fatty acids from total lipids of the gorgonian Leptogorgia piccola (white and yellow morphs), collected from the same area at two different periods with regard to the average water temperature, were studied. More than fifty fatty acids were identified as methyl esters and N-acyl pyrrolidides by gas chromatography and gas chromatography/mass spectrometry. Three new, branched-chain unsaturated fatty acids were identified in addition to the unusual 7-methyl-6-hexadecenoic acid, namely 10-methyl-6-hexadecenoic, 7,9-dimethyl-6-hexadecenoic, and 10-methyl-6,9-heptadecadienoic acids. Also 6,9-heptadecadienoic acid was identified. The fatty acid patterns of specimens harvested in colder waters were quite different from those harvested in warmer waters in that the former contained high amounts of methylene-interrupted polyunsaturated acids, including tetracosapolyenoic acids, especially 6,9,12,15,18-24:5 (up to 15.8% of the total acid mixture) and 6,9,12,15,18,21-24:6 (up to 5.3%). Arachidonic acid was, nevertheless, a major component in all the fatty acid mixtures studied (13.6-20.5%). Based on gas chromatography/fourier transform infrared experiments, the double bonds were assigned the (Z) configuration. Several fatty aldehydes and their dimethyl acetals were also detected, of which the most abundant was octadecanal.
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页码:459 / 466
页数:8
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