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Title: Polymer-induced tubulation in lipid vesicles
Author: Campelo, F.
Hernández Machado, Aurora
Keywords: Biofísica
Issue Date: 2008
Publisher: American Physical Society
Abstract: A mechanism of extraction of tubular membranes from a lipid vesicle is presented. A concentration gradient of anchoring amphiphilic polymers generates tubes from budlike vesicle protrusions. We explain this mechanism in the framework of the Canham-Helfrich model. The energy profile is analytically calculated and a tube with a fixed length, corresponding to an energy minimum, is obtained in a certain regime of parameters. Further, using a phase-field model, we corroborate these results numerically. We obtain the growth of tubes when a polymer source is added, and the budlike shape after removal of the polymer source, in accordance with recent experimental results.
Note: Reproducció digital del document proporcionada per PROLA i
It is part of: Physical Review Letters, 2008, vol. 100, núm. 15, p. 158103-1-158103-4
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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