Modulation of Elasticity and Interactions in Charged Lipid Multibilayers: Monovalent Salt Solutions.

ABSTRACT: We have studied the electrostatic screening effect of NaCl solutions on the interactions between anionic lipid bilayers in the fluid lamellar phase using a Poisson-Boltzmann-based mean-field approach with constant charge and constant potential limiting charge regulation boundary conditions. The full DLVO potential, including the electrostatic, hydration and van der Waals interactions, was coupled to thermal bending fluctuations of the membranes via a variational Gaussian Ansatz. This allowed us to analyze the coupling between the osmotic pressure and the fluctuation amplitudes and compare them both simultaneously with their measured dependence on the bilayer separation, determined by the small-angle X-ray scattering experiments. High-structural resolution analysis of the scattering data re

SUBMITTER: Lu BS 

PROVIDER: S-EPMC5180256 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature