Fig. 3: Nuclei entrain the system to the trigger wave regime.
From: Spatial heterogeneity accelerates phase-to-trigger wave transitions in frog egg extracts
a Representative kymograph of the effects of adding sperm DNA (+XS). A magnified view of the region inside the red rectangle is provided in the lower panel to show nuclear growth before the entry into mitosis (red arrows). T1 and T2 mark the regions used in (b). b Comparison of shifted mean-corrected FRET ratio at early times with no clear wavefront (top) and distinctive traveling pulses at late times (bottom). c Comparison of the time dependence of the slope for the case of added sperm DNA (+XS, orange) and control (−XS, green). Kernel density estimations (normalized at each time) and LOWESS curves are given in the corresponding colors. d Time evolution of the period (top) and wave speed (bottom) for +XS. e Speed-period relations for both conditions are obtained from LOWESS curves in Fig. 1d (−XS) and Fig. 3d (+XS), respectively. Open circles (−XS) and open squares (+XS) along the line highlight multiples of 100 min. The transition points are marked on dashed guides for each, as done previously. Data are pooled from two independent egg batches with three replicates each (n = 6).
