Fig. 7: Spatial heterogeneity coordinates phase-to-trigger wave transition.
From: Spatial heterogeneity accelerates phase-to-trigger wave transitions in frog egg extracts
a Time evolution of wave speed. Each vertical line with the corresponding arrow on the top indicates τ0 for each experimental condition (461, 115, 146, and 45 min for Control, +XS, +CSF, and +XS/+CSF, respectively). The horizontal line depicts the terminal speed for the excitable system (40 μm/min). b Exponential relaxation of late-time wave speed. Time is measured from respective τ0, and speed is offset by the terminal speed and then normalized against the speed at τ0. The negative reciprocal of the curve slope gives a visual estimation of Δτ, which are 526, 157, 396, and 81 min for each condition. Dotted guidelines correspond to 50 and 500-min time scale relaxations, respectively. c Transition time scales τ0 and Δτ (top) and terminal speeds (bottom). Terminal speeds are 44, 39, 27, and 31 μm/min for each condition, converging to a similar level and comparable to the traveling speed of the activation pulse in interphase extracts driven by CSF (40 μm/min).
