title: Dynamic structure and phase behavior of dimyristoylphosphatidylethanolamine bilayers studied by deuterium nuclear magnetic resonance.
abstract: 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.
mesh_terms: D007700:Kinetics; D008051:Lipid Bilayers; D009682:Magnetic Resonance Spectroscopy; D008954:Models, Biological; D008968:Molecular Conformation; D010714:Phosphatidylethanolamines; D013696:Temperature
chemical_list: D008051:Lipid Bilayers; D010714:Phosphatidylethanolamines; C018525:1,2-dimyristoylphosphatidylethanolamine