Higher diffusion coefficients and on- and off-rates for Ca2+ binding to dye lead to single channel events that resemble those observed experimentally. Simulation of 500ms channel opening under (A) standard conditions of DCa=223µm2/s, αf=150/(µMs), depth=50nm, (B) DCa=600µm2/s, αf=150/(µMs), depth=250nm, (C) DCa=700µm2/s, αf=700/(µMs), depth=200nm, and (D) DCa=700µm2/s, αf=1400/(µMs), depth=250nm.