Karmakar, Sanat ; Raghunathan, V. A. (2003) Cholesterol-induced modulated phase in phospholipid membranes Physical Review Letters, 91 (9). 098102_1-098102_4. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v91/i9/e098102
Related URL: http://dx.doi.org/10.1103/PhysRevLett.91.098102
Abstract
We report the observation of a cholesterol-induced modulated phase (Pβ) in dipalmitoyl phosphatidylcholine bilayers. It occurs below the main transition of the lipid at cholesterol concentrations of around 15 to 20 mol % and is distinct from the ripple (Pβ') phase found in between the main and pretransitions at lower cholesterol concentrations. An electron density map of this phase, constructed from X-ray diffraction data from oriented multilayers, shows that the bilayers in this phase have a one-dimensional periodic height modulation with an amplitude of about 2.5 Å. A partial phase diagram of the system deduced from diffraction data is in broad agreement with earlier studies.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 57504 |
Deposited On: | 27 Aug 2011 12:26 |
Last Modified: | 18 May 2016 08:52 |
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