Budding and Fission of a multiphase vesicle

Abstract

We present a model of bi-phasic vesicle in the limit of large surface tension. In this regime, the vesicle is completely stretched and well described by two spherical caps with a fold which concentrates the membrane stress. The conservation laws and geometric constraints restrict the space of possible shapes to a pair of solutions labeled by a parameter $\tau$ given by {\it line tension/pressure}. For a given $\tau$ value, the two solutions differ by the length of the interface between domains. For a critical value $\tau \_c$, the two vesicle shapes become identical and no solution exists above this critical value. This model sheds new light on two proposed mechanisms (osmotic shocks and molecule absorption) to explain the budding and the fission in recent experiments.

References in corpus (8)

• Dynamics of Domain Growth in Self-Assembled Fluid Vesicles
• Interaction of Conical Membrane Inclusions: Effect of Lateral Tension
• Fission of a multiphase membrane tube
• Interactions between proteins bound to biomembranes
• Local entropic effects of polymers grafted to soft interfaces
• Dynamics of non-equilibrium membrane bud formation
• Elastic interaction between "hard'' or "soft" pointwise inclusions on biological membranes
• Bi-Phasic Vesicles: instability induced by adsorption of proteins

Cited by in corpus (1)

• Lipid Domain Order and the Algebra of Morphology