By Gerhard Gompper, Michael Schick

The fourth quantity during this sequence makes a speciality of organic membrane technological know-how, particularly its biophysics. in actual fact divided into components, the 1st covers crimson blood mobilephone shapes, whereas the second one half on molecular simulation offers in-depth details on easy methods to make major growth with membrane characterization via types, and the way to refine them via evaluating them to experiments.
the result's a hugely suitable monograph for either an realizing of the biophysical ideas in addition to of novel applications.Content:
Chapter 1 Simulations and types of Lipid Bilayers (pages 1–82): Sagar A. Pandit and H. Larry Scott
Chapter 2 crimson Blood phone Shapes and form modifications: Newtonian Mechanics of a Composite Membrane: Sections 2.1–2.4 (pages 83–139): Gerald Lim H. W., Michael Wortis and Ranjan Mukhopadhyay
Chapter 2 crimson Blood cellphone Shapes and form alterations: Newtonian Mechanics of a Composite Membrane: Sections 2.5–2.8 (pages 139–204): Gerald Lim H. W., Michael Wortis and Ranjan Mukhopadhyay

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Extra resources for Soft Matter, Volume 4: Lipid Bilayers and Red Blood Cells

Example text

Torbet and Wilkins (1976) developed a model with constant electron densities for di=erent regions of the lipid bilayer. Due to the use of step functions the model develops discontinuities leading to high frequency noise at the large amplitudes of the form factor (see figures 5, 7, 8 of Klauda 2006). To overcome the di;culties introduced by step functions Wiener and White (1991, 1992, 1992) introduced a model in which overlapping Gaussian distributions were used. Although this model did not have discontinuities it was necessary to tune a large number of free parameters and consequently non-unique solutions were possible.

The conclusions drawn from simulations are consistent with experimentally observed e=ects of cholesterol, including the condensation e=ect of cholesterol in phospholipid monolayers and the tendency of cholesterol-rich domains to form in cholesterol-lipid bilayers, but the short simulation times shed no light on the longer-time stability of the subunits. However the data shown in Fig. 16 and the insights that resulted from the DPPC-cholesterol simulations are an early example of the powerful insight that can come from careful simulations.

1982; Wack and Webb 1988; Sun et al. 1996; Woodward and Zasadzinski 1997; Sengupta et al. 2003). The consensus is that the ripple phase consists of asymmetric linear parallel corrugations across the membrane. The ripple wavelength varies for di=erent lipids but is generally between 11 and 20 nm. The asymmetry presents itself in the form of major and minor domains. The major domain has structure similar to the gel phase of the lipid under study while the minor domain shows significantly greater disorder and possible chain interdigitation.

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