Regensburg 2019 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 12: Poster II

BP 12.45: Poster

Dienstag, 2. April 2019, 14:00–16:00, Poster B2

Limiting shapes of confined lipid vesicles — •Bor Kavčič¹, Ai Sakashita^2,3, Hiroshi Noguchi³, and Primož Ziherl^4,5 — ¹IST Austria, Klosterneuburg, Austria — ²Ochanomizu University, Tokyo, Japan — ³University of Tokyo, Tokyo, Japan — ⁴University of Ljubljana, Ljubljana, Slovenia — ⁵Jožef Stefan Institute, Ljubljana, Slovenia

We theoretically study the shapes of lipid vesicles confined to a spherical cavity, elaborating a framework based on the so-called limiting shapes constructed from geometrically simple structural elements such as double-membrane walls and edges. Partly inspired by numerical results, the proposed non-compartmentalized and compartmentalized limiting shapes are arranged in the bilayer-couple phase diagram which is then compared to its free-vesicle counterpart. We also compute the area-difference-elasticity phase diagram of the limiting shapes and we use it to interpret shape transitions experimentally observed in vesicles confined within another vesicle. The limiting-shape framework may be generalized to theoretically investigate the structure of certain cell organelles such as the mitochondrion.