Lipid organization has been at the center of research on lipid rafts. Dioleoylphosphatidylcholine (DOPC) is a typical unsaturated lipid. Very few studies have reported its thermodynamics in raft-like membranes. Herein, we have developed a highly efficient synthetic method for [C6-2H2] oleic acid, and newly synthesized [C6-2H2] DOPC. In raft-like oriented bilayers, [C6-2H2] DOPC shows clear phase separation and characteristic phase behavior at various temperature. It has been successfully utilized for the comparison of membrane properties between sphingomyelin (SM) and dihydrosphingomyelin (DHSM) membranes.
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