Figure 6. Effect of Sir2 perturbations: Correlation length of silenced mark () state of the system along the zero-velocity-line in Fig. 4. Sir inhibition pushes the system to the bivalent-stable phase.

The transition from active-silenced-bistable state (wild-type) to the bivalent-stable phase is approximately at . The correlation length is high, as expected, in the bistable region where silencing domains are established, however, the system continues to enjoy relatively strong correlation lengths in the bivalent-stable phase. The scale on the y-axis depends on the (unknown) biophysical parameters of the wild-type system, we are only reporting the trend.