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Shapes of phospholipid vesicles with beadlike protrusionsBožič, Bojan, 1965- ...Giant phospholipid vesicles obtained by the method of electroformation were observed by the phase contrast microscope. Most of these vesicles contain a protrusion which shortens in a slow shape ... transformation process until it is absorbed into the main vesicle body. We are concerned with the last stages of this shape transformation process, where the protrusions attain a beadfike shape. The number of "beads" decreases one by one in consecutive steps, and itis demonstrated that each such step consists of two distinguishable phases. During the first phase the beadlike shape does not change and the necks connecting the "beads" are narrow. During the second phase the width of the protrusion necks increases. On the basis of the assumption that these shape transformations are driven by the decrease of the equilibrium difference between the outer and the inner membrane monolayers areas, the system behavioris analyzed in terms of the generalized bilayer couple model. The theoretical results confirm the observed time sequence: at a given number of "beads" the protrusion has in the first phase the shape that consists of spheres connected by infinitesimal necks, and during the second phase the protrusion is a single prolate unit with open necks. The discrepancies betweenthe observed and the predicted widths of the necks are interpreted by the repulsive forces between the neighboring "beads" induced by the membrane thermal fluctuations. The analysis presented extends the existing catalog of vesicle shapes to the region of larger differences between the areas of membrane monolayers, and confirms the applicability of the generalized bilayercouple model to the description of the shape behavior of phospholipid vesicles containing beadlike protrusions.Vir: European biophysics journal. - ISSN 0175-7571 (Letn. 31, 2002, str. 487-496)Vrsta gradiva - članek, sestavni delLeto - 2002Jezik - angleškiCOBISS.SI-ID - 15871961
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Baze podatkov, v katerih je revija indeksirana
Ime baze podatkov | Področje | Leto |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Božič, Bojan, 1965- | 11088 |
Gomišček, Gregor | 18038 |
Kralj-Iglič, Veronika | 05916 |
Svetina, Saša, 1935- | 02013 |
Žekš, Boštjan | 01068 |
Vir: Osebne bibliografije
in: SICRIS
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