Figure 6.

Structural data on the dense phase of 6B10 IDPs with affinities $\epsilon =0.6, 0.68, 0.76$ (from bottom to top) as a function of the P24 crowder concentration for several values of IDP concentration. Panels (a,d,g) in the first column show that the number of IDPs in the Largest Equilibrium Network (LEN) increases with increasing IDP concentration and that a lower affinity requires a higher crowder concentration before the dense phase appears. The middle column (b,e,h) shows that the separation between the junctions at which IDP binding sites meet is independent of the IDP concentration, and decreases slowly with increasing crowder concentration. The final column (c,f,i) shows that the mean number of IDPs binding at the junctions is also independent of the IDP concentration but increases weakly with increasing crowder concentration. Note that if the LEN does not exist, the data points lie on the abscissa.