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Updated: Aug 14, 2026

Membrane Remodeling of Giant Vesicles in Response to Localized Calcium Ion Gradients
Published on: July 16, 2018
Cotransport-induced instability of membrane voltage in tip-growing cells
M Leonetti1, P Marcq, J Nuebler
1IRPHE, Universités Aix-Marseille I and II, UMR CNRS 6594, Technopôle de Château-Gombert, 13384 Marseille Cedex 13, France.
Abstract:
A salient feature of stationary patterns in tip-growing cells is the key role played by the symports and antiports, membrane proteins that translocate two ionic species at the same time. It is shown that these cotransporters destabilize generically the membrane voltage if the two translocated ions diffuse differently and carry a charge of opposite (same) sign for symports (antiports). The orders of magnitude obtained for the time and length scale are in agreement with experiments. A weakly nonlinear analysis characterizes the bifurcation.
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