Four different mechanisms for switching cell polarity
Fig 3
Switching regimes for each of the model parameters.
Regions in which the deterministic model shows switches are indicated by thick black outlines. The green shading shows the switching probability of the stochastic model with N = 103.75. The upper half of the phase diagram shows results for a signal that enhances the reaction rate, and the lower half for a repression of the rate. The colored bars to the right of each panel indicate the class of dynamics when the corresponding amplitude of signal is applied, with yellow for polarized, orange for oscillatory and blue for symmetric polar distribution of A. The red symbols indicate the signal amplitude and duration of the trajectories shown in Fig 4.