 (J Analysis of the extent of signal spreading in the z-dimension (apico-basla) of basal myosin-II. Myosin-II signal intensity was plotted along the apicobasal axis and a Gaussian curve fitted to the basal peak. The width of the Gaussian fit was used as a parameter to estimate myosin-II signal spreading in the z-dimension, which was limited to 4 µm (N=3). In each box plot, the central mark, the bottom, and the top edge of each box indicates the median, the 25th and 75th percentile, respectively. Whiskers extent to the most extreme data point 