Berlin 2015 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 3: Statistical Physics of Biological Systems I (joint DY/BP/CPP)

BP 3.9: Vortrag

Montag, 16. März 2015, 12:00–12:15, BH-N 243

Simple association-dissociation-aging process: recursive solution — •Thomas Niedermayer and Reinhard Lipowsky — Max Planck Institute of Colloids and Interfaces, Potsdam, Germany

The simple association-dissociation-aging process (SADAP) is characterized by the coupling of stochastic growth and shrinkage of one-dimensional structures to the random aging of the constituting subunits. Most prominently, SADAPs capture the essential features of the polymerization of actin filaments and microtubules. Previously employed mean field methods fail to describe the dynamics of SADAPs. We found an ansatz for the full master equation which allows us to study SADAPs analytically and derive a recursion relation for the steady state solution which enables the calculation of all emergent quantities with increasing accuracy. In particular, our method allows, for the first time, the precise calculation of the boundary between the growth and shrinkage regime, in excellent agreement with results from stochastic simulations.