Figure 4.

Schematic representation of the patterns of interactions arising in a system of N = 4 ceRNAs at different miRNA levels (increasing from A to D). (A) All ceRNAs are in the $\mathcal{F}$-regime ($\left[\mu \right]\ll {\mu }_{0,i}\forall i$) and there is no interaction between them. (B) ceRNAs 1 and 3 are in the $\mathcal{S}$-regime ($\left[\mu \right]\simeq {\mu }_{0,1}\simeq {\mu }_{0,3}$) and a symmetrical interaction between them is switched on. (C) ceRNAs 1 and 3 are now in the $\mathcal{B}$-regime ($\left[\mu \right]\gg {\mu }_{0,1}\simeq {\mu }_{0,3}$) while ceRNAs 2 and 4 are in the $\mathcal{S}$-regime ($\left[\mu \right]\simeq {\mu }_{0,2}\simeq {\mu }_{0,4}$): the resulting interactions are symmetric between 2 and 4, and asymmetric between ceRNAs 1 and 3 on ceRNAs 2 and 4. (D) All ceRNAs are in the $\mathcal{B}$-regime ($\left[\mu \right]\gg {\mu }_{0,i}\forall i$) and no cross-talk occurs.