Parameters of spontaneous cell migration.

†Cell Speed was calculated from the centre of mass displacements at 15-s time intervals. Asterisk: significantly different from WT, two-tailed Student's t-test (**p<0.001, *p<0.05) Error indicates standard deviation. ND: not detectable
¶Roundness that is defined as the ratio of the short and long axis of the ellipsoid is an indication of the polarity of the cells. Larger value indicates that the cells are more round and less polarized. Cell shape was approximated into the ellipsoid with the same centroid. Asterisk: significantly different from WT, two-tailed Student's t-test, (p<0.01). Error indicates standard deviation.
‡Persistence length (PL) is the length that a cell moves in a given direction straightly. We show the number of cells exhibiting elongation, rotation, and oscillation patterns. N is the total number of cells we sampled. Elongation, rotation, and oscillation: the number of cells for each pattern.