Fig. 6.

Regimes of coexistence (bistability) between the induced and uninduced states when varying the activation rates, demonstrating the model’s sensitivity to the parameter $I_{\rho }$. The gray region (bounded by two black lines) corresponds to the bistable regime in which both of these states coexist, whereas the white regions correspond to the monostable regimes in which either the induced (above the gray region) or uninduced (below the gray region) state exists. Notice that decreasing the value of $I_{\rho }$ from (A) $I_{\rho }=0.016$ s⁻¹ to (B)$I_{\rho }=0.013{\mathrm{s}}^{-1}$ diminishes the regime of bistability until it becomes almost negligible.