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. 2018 Dec 3;217(12):4230–4252. doi: 10.1083/jcb.201806161

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© 2018 Michaux et al.

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Figure 3. — Spatiotemporal modulation of assembly and disassembly drives transient accumulation of F-actin and Myosin II during pulsed contractions. (A–D) Data from individual pulses, aligned with respect to the onset of contraction and then averaged to display particle-based strain rate (A), numbers of actin molecules (scaled by the average number for each pulse; B), appearance rate (C), and disappearance rate (D) versus time. (E) Total rate of change in actin density (green) and the individual contributions to rate of change from turnover (red) and surface contraction (purple). (F) Distribution of time delays between the initiation of contraction and actin accumulation. Data in A–F were averaged over 42 pulses, collected in eight embryos. (G–J) Average myosin dynamics synchronized with respect to time at which myosin density reached peak levels during a pulse, displaying particle-based strain rate (G), number of molecules (scaled to the average number for each pulse; H), appearance rate (I), and disappearance rate (J) versus time. (K) Total rate of change in myosin density (green) and the individual contributions to rate of change from turnover (red) and surface contraction (purple). Data in G–K were averaged over 30 pulses, collected in five embryos. Shaded areas represent 95% confidence intervals.