Fig 10. Analytically computed upper and lower boundaries to the MC-HD shock phase, depending on $\tilde{\Gamma }$ for L = 1.

The green line represents the lower boundary ${\tilde{\beta }}_l^{*}$ and the blue line corresponds to the upper boundary ${\tilde{\beta }}_u^{*}$. The horizontal red dashed line serve as illustration. The intersections (at $\tilde{\beta }=0.1$) with ${\tilde{\beta }}_l^{*}$ and ${\tilde{\beta }}_u^{*}$ indicate the values of the drop-off rates at which an mRNA with termination rate $\tilde{\beta }=0.1$ would undergo a transition from HD to SP, and from SP to MC, respectively.