First, we investigate the uncharged ELP and relate qualitatively the simulation results to the known experimental data. Two different regimes, determined by the salt type, can be observed when the mean radius of gyration of the uncharged 200-mer is plotted as a function of the salt concentration, Figure . The repulsive salts (ε anion = 0.1 k B T and 0.3 k B T) induce a collapse through repulsion as the salt concentration increases. The salts with an attractive anion (ε anion = 0.7 k B T and 0.9 k B T) cause swelling of the polymer coil by attraction. Both regimes are described in detail for non-ionic cosolutes in our previous work, with the typical conformations of the polymer chain illustrated in Figure ), respectively.