Fig. 4. Microtubule dynamic instability differs in leading and trailing edges of CHO and LLCPK1 cells. Solid bars, leading edges; hatched bars, trailing edges. (A) Dynamicity, (B), catastrophe frequency, (C) pause duration, (D) Percentage time in pause. Microtubules in trailing edges have more catastrophes and greater overall dynamicity (A,B); microtubules in leading edges spend more time in pause and have longer pause durations (C,D). Error bars show standard error of the mean.