HEWL translational diffusion coefficients. Normalized long-time translational self-diffusion coefficients of HEWL at low ionic strength. Simulations were performed at 1 mM (A) and 5 mM (B) ionic strength. Experimental values from ref.  (black diamonds), and computed values from BD simulations with (red squares) and without (green squares) Debye-Hückel potential are shown. The Tokuyama  analytical model is shown by the black dotted line. Insets are log-log plots of the same data.