Dynamical Instability in Boolean Networks as a Percolation Problem
  Boolean networks, widely used to model gene regulation, exhibit a phase transition between regimes in which small perturbations either die out or grow exponentially. We show and numerically verify that this phase transition in the dynamics can be mapped onto a static percolation problem which predicts the long-time average Hamming distance between perturbed and unperturbed orbits. 
Shane Squires, Edward Ott, and Michelle Girvan
cond-mat.stat-mech physics.bio-ph q-bio.MN