Fig. 4.

Discrete movement of thiol–water interface. The interface between the aqueous (light shading) and thiol (dark shading) phases moves toward the right in discrete bursts rather than as a continuous process. (A) Flat-field images. (B) Consecutive subtraction images highlighting individual bursts of activity. (C) Composite image of A and B highlighting colocalization of activity and the motion of the interface. Δt = 400 ms. (Scale bars: 1 µm.) An animated version of Fig. 4 is shown in Movie S5.