Non-equilibrium raft-like membrane domains under continuous recycling

Details Non-equilibrium raft-like membrane domains under continuous recycling Non-equilibrium raft-like membrane domains under continuous recycling

2005-03-30

arxiv.org/abs/cond-mat/0503692v1

Physics

Condensed Matter

Soft Condensed Matter

8 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.95.168301

We present a model for the kinetics of spontaneous membrane domain (raft) assembly that includes the effect of membrane recycling ubiquitous in living cells. We show that the domains have a broad power-law distribution with an average radius that scales with the 1/4 power of the domain lifetime when the line tension at the domain edges is large. For biologically reasonable recycling and diffusion rates the average domain radius is in the tens of nm range, consistent with observations. This represents one possible link between signaling (involving rafts) and traffic (recycling) in cells. Finally, we present evidence that suggests that the average raft size may be the same for all scale-free recycling schemes.

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