Co-transport-induced instability of membrane voltage in tip-growing cells

Details Co-transport-induced instability of membrane voltage in tip-growing cells Co-transport-induced instability of membrane voltage in tip-growing cells

2005-12-09

arxiv.org/abs/q-bio/0512023v1

Phys. Rev. Lett. 95 (2005) 208105

Biology

Quantitative Biology

Quantitative Methods

Scientific paper

10.1103/PhysRevLett.95.208105

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 co-transporters destabilize generically the membrane voltage if the two translocated ions diffuse differently and carry a charge of opposite (same) sign for symports (antiports). Orders of magnitude obtained for the time and lengthscale are in agreement with experiments. A weakly nonlinear analysis characterizes the bifurcation.

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