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Originally published as Biophys J. BioFAST on January 11, 2007.
doi:10.1529/biophysj.106.099721
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Biophysical Journal 92:2445-2450 (2007)
© 2007 The Biophysical Society

Effect of Surface Treatment on Diffusion and Domain Formation in Supported Lipid Bilayers

Kalani J. Seu, Anjan P. Pandey, Farzin Haque, Elizabeth A. Proctor, Alexander E. Ribbe and Jennifer S. Hovis

Department of Chemistry, Purdue University, West Lafayette, Indiana

Correspondence: Address reprint requests to Jennifer S. Hovis, Dept. of Chemistry, Purdue University, West Lafayette, IN 47907-2018. Tel.: 765-494-4115; Fax: 765-494-0239. E-mail: jhovis{at}purdue.edu.

Supported lipid bilayers are widely used as model systems due to their robustness. Due to the solid support, the properties of supported lipid bilayers are different from those of freestanding bilayers. In this article, we examine whether different surface treatments affect the properties of supported lipid bilayers. It will be shown that depending on the treatment method, the diffusion of the lipids can be adjusted approximately threefold without altering the composition. Additionally, as the bilayer-support interaction decreases, it becomes easier to form coexisting liquid-ordered and liquid-disordered domains. The physical/chemical alterations that result from the different treatment methods will be discussed.




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