title: Nonlinear Poisson-Boltzmann model of charged lipid membranes: Accounting for the presence of zwitterionic lipids.
abstract: The nonlinear Poisson-Boltzmann model is used to derive analytical expressions for the free energies of both mixed anionic-zwitterionic and mixed cationic-zwitterionic lipid membranes as function of the mole fraction of charged lipids. Accounting explicitly for the electrostatic properties of the zwitterionic lipid species affects the free energy of anionic and cationic membranes in a qualitatively different way: That of an anionic membrane changes monotonously as a function of the mole fraction of charged lipids, whereas it passes through a pronounced minimum for a cationic membrane.
authors.affiliation: Department of Physics, North Dakota State University, Fargo, North Dakota 58105-5566, USA.
authors.forename: Demmelash H
authors.initials: DH
authors.lastname: Mengistu
authors.forename: Sylvio
authors.initials: S
authors.lastname: May
mesh_terms: D002462:Cell Membrane / Q000737:chemistry*; D008563:Membrane Lipids / Q000737:chemistry*; D008956:Models, Chemical; D017711:Nonlinear Dynamics; D016012:Poisson Distribution; D013816:Thermodynamics
chemical_list: D008563:Membrane Lipids