AI Article Synopsis
- The paper explores the properties of biphasic lipid vesicles that contain embedded proteins, highlighting the contrast between the well-understood homogeneous membranes and the less-studied inhomogeneous ones.
- A phenomenological approach is used to examine how the fraction of proteins affects the vesicle's shape, leading to derived equations for energy minimization and stability analysis.
- Findings reveal two stability regimes for vesicles based on the interaction between proteins and membranes: one with easy instability when coupling is strong, and another with difficult instability when coupling is weak.
Article Abstract
The basic physical properties of homogeneous membranes are relatively well known, while the effects of inhomogeneities with membranes are very much an active field of study. In this paper, a biphasic lipid vesicle with membrane embedded proteins is investigated. To take into account the influences of the proteins, a simple phenomenological coupling between the local fraction of proteins and the mean curvature square is suggested. By minimizing the energy of system, the E-L equations and boundary conditions are obtained and solved analytically for vesicle with a simple shape. Besides, stability phase diagrams and stability factor are put forward by linear perturbation analysis. Our results show two different situations which are strongly dependent on the nature of the proteins: a regime of easy instability when the proteins are strongly coupled to the membrane and a regime of difficult instability.
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| http://dx.doi.org/10.1016/j.jbiomech.2006.06.015 | DOI Listing |
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