Figure 2

Distributions of step length for CC cells. For each CC cell we evaluate the extent of the motion performed during the time lapse between two consecutive measurements. This can be quantified in terms of displacement along the x and the y direction and the related step lengths are referred to as Δx and Δy. By merging experimental data from the whole set of tracks we build the distributions P(Δx) and P(Δy) shown in these panels in a semi-logarithmic scale, where experimental data are reported with standard errors. Neglecting the tails of the distributions (for which the statistics is rather poor), we can fit these distributions according to exponential and Gaussian functions, as reported in the panels together with the related fit coefficients. The motion resulting from these distributions displays a drift along positive x and negative y.