Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2007-11-20
Europhysics Letters, 83, 50009 (2008)
Physics
Condensed Matter
Statistical Mechanics
Scientific paper
10.1209/0295-5075/83/50009
Experiments show that the movement of eukaryotic cells is regulated by a process of phase separation of two competing enzymes on the cell membrane, that effectively amplifies shallow external gradients of chemical attractant. Notably, the cell is able to self-tune the final enzyme concentrations to an equilibrium state of phase coexistence, for a wide range of the average attractant concentration. We propose a simple lattice model in which, together with a short-range attraction between enzymes, a long-range repulsion naturally arises from physical considerations, that easily explains such observed behavior.
Candia Antonio de
Coniglio Antonio
Ferraro Teresa
Gamba Andrea
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