FIGURE 2.

Snapshots of concentration distribution from a sample PSE simulation in a reconstructed ER geometry. The results at times t = 1 δt (a), t = 25 δt (b), t = 150 δt (c), and t = 300 δt (d) are shown for a molecular diffusion constant of D = 3 × 10⁻⁵ b²/δt. All units are scaled with the simulation time step δt and the lateral edge length b of the bleached region. The ER membrane is visualized as a transparent surface and the concentration of green fluorescent protein as a volume density cloud inside it. The bleached region is represented by the outline of a cube. Only the part of the ER around the bleached region is shown.