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Incorporation of Positional Isomers of cis- and trans-Octadecenoic Acids into the Acyl Lipids of Cultured Soya Cells

Cell suspension cultures of soya were incubated with cis-[1-14C]octadecenoic acids and trans- [1-14C]octadecenoic acids, each of known composition with regard to positional isomers. Each of the positional isomers ranging from ⊿8- to ⊿15-as-octadecenoic acids and ⊿7- to ⊿16-frans-octadecenoic acids was readily incorporated into the acyl lipids of the cells, yet, the ⊿9 cis- and the ⊿9-trans-isomers were the preferred substrates, cis-trans Isomerization did not occur during the incorporation of the fatty acids into the acyl lipids.