Vimentin assembly kinetics. (red diamonds), (blue circles), (black squares), and ρ (green diamonds) are plotted against time for a vimentin solution (0.07 g/L protein, 0.05 M KCl). Symbols at t = 0.03 min correspond to the values of vimentin before addition of KCl; i.e., t = 0. ρ is multiplied by a factor of 10.