Steric Structures of Triacylglycerols in the Seed Oil of Carrot <I>Daucus carota</I> L. var. <I>sativa</I> DC.

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  • ニンジン種子油のトリアシルグリセリンの立体構造
  • ニンジン シュシユ ノ トリアシルグリセリン ノ リッタイ コウゾウ エイブン

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The steric structures of the triacylglycerols (TGs) in the seed oil of carrot Daucus carota L. var. sativa DC. were studied by the stereospecific analysis of the acyl distributions using the chiral-phase high-performance liquid chromatography of the monoacylglycerol derivatives. Total fatty acids of the seed oil TGs contained 71 mol % petroselinic acid (6-18 : 1), 12 mol % oleic acid (9-18 : 1), 11 mol %linoleic acid (18 : 2 n-6), and 4 mol % palmitic acid (16 : 0). Fatty acid percents in each sn-1, sn-2 and sn-3 position of the TGs were 6-18 : 1 (38, 23 and 40 %), 9-18 : 1 (21, 66 and 13 %), and 18 : 2 n-6 (20, 65and 15 %). Structures and estimated contents of the major TG components in the carrot seed oil wasfound to be (6-18 : 1) (6-18 : 1) (6-18 : 1) 3248 %, (6-18 : 1) (9-18 : 1) (6-18 : 1) 1725 %, (6-18 : 1) (18 : 2 n-6) (6-18 : 1) 1522 %. Petroselinic acid distributes preferentially at the sn-1 and sn-3 positionsin the carrot seed oil TGs in analogy with 16 : 0 and 18 : 0 in the ordinary seed oil TGs.

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