Literature DB >> 19659249

Ordered nanoclusters in lipid-cholesterol membranes.

Maria K Ratajczak1, Eva Y Chi, Shelli L Frey, Kathleen D Cao, Laura M Luther, Ka Yee C Lee, Jaroslaw Majewski, Kristian Kjaer.   

Abstract

X-ray diffraction of sphingomyelin-dihydrocholesterol (SM-DChol) monolayers revealed short-ranged ( approximately 25 A) 2D ordering. These nanoclusters show two distinct regions: below the cusp point of the phase diagram (35 mol% DChol), a constant d spacing was observed; above the cusp, the d spacing increases linearly with DChol in accordance to Vegard's law for binary alloys. The components in this lipidic alloy are thus a 65ratio35 SM-DChol entity and excess DChol. Reflectivity data further support the emergence above the cusp of an uncomplexed DChol population with greater vertical mobility.

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Year:  2009        PMID： 19659249     DOI： 10.1103/PhysRevLett.103.028103

Source DB:  PubMed          Journal:  Phys Rev Lett        ISSN： 0031-9007            Impact factor:   9.161


  10 in total

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  10 in total

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