Abstract

With two independent experimental measurements (capacitance and optical measurements) on the same lipid bilayer and the knowledge of an asymmetric dielectric constant calculated from a model of the bilayer, the thickness, the average area per hydrocarbon chain and the dielectric constant of the bilayer, which are consistent with the data of two independent experiments, were obtained. By using various data of capacitance and optical reflectance on lecithin bilayers, the thickness (54 ∼ 48 A), area per hydrocarbon chain (23·5 ∼ 25·0 A2) and dielectric constant (e‖ = 2·32 ∼ 2·29, e⊥ = 2·59 ∼ 2·25) for the lecithin (egg) bilayer were deduced.

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