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Tension-Induced Morphological Transition in Mixed Lipid Bilayers S. Komura* and N. Shimokawa
 

Summary: Tension-Induced Morphological Transition in Mixed Lipid Bilayers
S. Komura* and N. Shimokawa
Department of Chemistry, Faculty of Science, Tokyo Metropolitan UniVersity, Tokyo 192-0397, Japan
D. Andelman
School of Physics and Astronomy, Raymond and BeVerly Sackler Faculty of Exact Sciences,
Tel AViV UniVersity, Ramat AViV 69978, Tel AViV, Israel
ReceiVed NoVember 19, 2005. In Final Form: March 5, 2006
Recently, Rozovsky et al. reported on the morphology and dynamics of superstructures in three-component lipid
bilayers containing saturated lipid, unsaturated lipid, and cholesterol (Rozovsky, S.; Kaizuka, Y.; Groves, J. T. J. Am.
Chem. Soc. 2005, 127, 36). We suggest that the observed sequence of the striped-to-hexagonal morphological transition
in mixed bilayers can be attributed to an enhanced membrane surface tension that is induced by the vesicle adhesion
onto the solid surface.
I. Introduction
Raft domains in biological cell membranes are associated with
membrane signaling pathways and have attracted a great deal of
interest in recent years.1,2 Because of the complexity of biological
membranes, a minimal model to investigate rafts (or more
precisely, domain formation) consists of three-component lipid
bilayers containing saturated and unsaturated lipids as well as
cholesterol. These three-component systems have been inves-

  

Source: Andelman, David - School of Physics and Astronomy, Tel Aviv University

 

Collections: Materials Science; Physics