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  • Interaction between two cylindrical inclusions in a symmetric lipid bilayer
    Bohinc, Klemen, 1970- ; Kralj-Iglič, Veronika ; May, Sylvio
    We calculate the membrane-mediated interaction between two cylindrical inclusions in a symmetric lipid bilayer. Our theory takes two contributions tothe free energy into account, the elastic behavior ... of the membrane and the conformational restrictions that the flexible hydrocarbon chains of the lipidsexperience in the vicinity of a rigid inclusion. The description of the elastic behavior is based on two order parameters, the hydrophobic thickness of the membrane and a director field that characterizes the average tilt of the lipid chains. Conformational restrictions of the lipid chains are taken into account by a simple director model. We show that the short-range interaction potential between two inclusions sensitively depends on the degreeof hydrophobic mismatch and on the spontaneous curvature of the lipid layers. In particular, we find pronounced attraction if the hydrophobic mismatch is positive. For negative mismatch the attraction is much less pronounced and, additionally, an energetic barrier appears. The inclusions prefer a small but notable negative hydrophobic mismatch. Positive spontaneouscurvature amplifies these behaviors.
    Vir: The Journal of chemical physics. - ISSN 0021-9606 (Letn. 119, št. 14, 2003, str. 7435-7444)
    Vrsta gradiva - članek, sestavni del
    Leto - 2003
    Jezik - angleški
    COBISS.SI-ID - 17120473

vir: The Journal of chemical physics. - ISSN 0021-9606 (Letn. 119, št. 14, 2003, str. 7435-7444)
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