FIGURE 4.

Actomyosin activity reduces heterogeneous non-Gaussian diffusivity and endows Gaussian-like advective transport. (A) Comparing van Hove distributions of composites with different ${\varphi }_A$ (see legend) at lag times of $\mathrm{\Delta }t=0.3s$ (top) and $\mathrm{\Delta }t=10s$ (bottom). Color-coded solid lines are fits of each distribution to the sum of a Gaussian and an exponential: $G\left(\mathrm{\Delta }d\right)=A{e}^{-\frac{\left|\mathrm{\Delta }{d}^2\right|}{\lambda }}+B{e}^{-\frac{\left|\mathrm{\Delta }{d}^2\right|}{\lambda }}$. Black rectangles indicate regions of the distributions that are shown zoomed-in in (B). (C) Fractional amplitude of the Gaussian term in each fit, $a=A/(A+B)$, normalized by the corresponding value for ${\varphi }_A=0$. Fits are performed separately for the leading (+, triangles) and trailing (−, squares) edges of each distribution. Data shown are the averages and standard deviations across all lag times for each ${\varphi }_A$. (D) Fractional amplitude of the exponential term in each fit, $b=A/(A+B)$, normalized by the corresponding value for ${\varphi }_A=0$. Fits are performed separately for the leading (+, triangles) and trailing (−, squares) edges of each distribution. Data shown are the averages and standard deviations across all lag times for each ${\varphi }_A$.