Figure 2. Zigzag preference of crawling PMG and MG5 cells.
A) Typical return maps of turning angles 
(red, PMG;
blue, MG5), B) Histograms of the zigzag preference
(n = 8 for each case), C) Auto-correlation
functions of 
and their
corresponding fits to an exponential function, D) and E)
Auto-correlation functions of the instantaneous direction of movement
for PMG and MG5 cells, respectively (n = 8 for each
case). F) Histograms of the two time constants obtained by fitting the
curves in (D) and (E) to 
.
cos
in (D) and
(E) are the ensemble time average over the entire observation duration
of the inner-product between the two directional unit vectors separated
by 
.