Fig. 9. Average displacements, d, of normal and LM609-perturbed primordial endothelial cells as a function of the length of time interval, . Each curve is calculated from the trajectories of a least 40 PECs within a lateral area from each of three normal (QH1 only), three anti-v (QH1 plus anti-v) and three LM609-injected embryos (QH1 plus LM609). The form of the d() curve is highly characteristic for the underlying trajectories. As the plot with logarithmic scales (inset) demonstrates, the cells motility is superdiffusive and persistent (slope larger than 0.5). Blocking of the vß3 integrins results in a 40% reduction in the average displacements.