Dual-channel spinning-disk confocal time-lapse movie showing anaphase relative to poleward microtubule flux. Fluorescent speckle microscopy (FSM) of microtubules was performed as described in Maddox et al. (2002, 2003), and with a 100X/1.4 NA Plan Apochromat objective (Nikon) with 2X2 binning in the cooled CCD camera (model ER; Hamamatsu Corporation). MetaMorph® software (Universal Imaging Corp.) was used to control shutters, wavelength selection, image acquisition, and storage. DNA was visualized by adding Oli-green to the extract (final concentration of 1 µg/ml). Images were acquired at 10-s intervals. Sequential images of different fluorophores were acquired at 3-15s intervals, depending on the experiment. Paired images from different color channels were within 0.5 s of each other. Movie is video 1 from J Cell Biol 2003 162:377-382.