Video 4
Tubulin speckles demonstrate antiparallel MT sliding and flux. The same simulation as in Video 3 is shown, but MTs are displayed as randomly incorporated tubulin speckles, as is observed experimentally when low amounts of fluorescently labeled tubulin are incorporated into the spindle. MTs oriented with plus ends to the right (green) can be seen to flux to the left, whereas MTs oriented to the left (red) flux to the right. Bar (blue), 5 ┬Ám.