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The dynamic structure of dimyristoylphosphatidylethanolamine bilayers has been studied by deuterium nuclear magnetic resonance spectroscopy of the perdeuterated sn-2 chain. The order parameter profile of the lipid chains in the fluid phase is qualitatively similar to that found for other phospholipids, but the order parameter plateau is ca. 15% higher than found for dimyristoylphosphatidylcholine at a comparable reduced temperature. The chains of dimyristoylphosphatidylethanolamine undergo a segmental motion in the gel phase, which for segments close to the end of the chain approximates continuous axial diffusion. In the phase-transition region, spectra are observed that can be best described in terms of the interconversion of coexisting lipid phases through the transition.

Type

Journal article

Journal

Biochemistry

Publication Date

07/06/1983

Volume

22

Pages

3023 - 3026

Keywords

Kinetics, Lipid Bilayers, Magnetic Resonance Spectroscopy, Models, Biological, Molecular Conformation, Phosphatidylethanolamines, Temperature