title: The diffusion-solubility of oxygen in lipid bilayers.
abstract: The product, Do alpha, of the oxygen diffusion coefficient, Do, and the oxygen solubility, alpha, is determined in phosphatidylcholine bilayers at temperatures above the lipid phase transitions from ESR spin-exchange measurements. The resulting values of Do alpha are in good agreement with those obtained from fluorescence-quenching experiments. The use of fatty acid spin labels makes it possible to measure Do alpha as a function of the coordinate perpendicular to the bilayer surface. The results indicate that do alpha is a strong function of this coordinate; it is greatest in the bilayer center and least near the bilayer head groups.
mesh_terms: D004058:Diffusion; D004578:Electron Spin Resonance Spectroscopy; D008051:Lipid Bilayers; D008433:Mathematics; D010100:Oxygen; D010713:Phosphatidylcholines; D012995:Solubility
chemical_list: D008051:Lipid Bilayers; D010713:Phosphatidylcholines; D010100:Oxygen