Chromosome segregation in control, CHC, and/or TACC3 siRNA-treated HeLa cells. HeLa cells were transfected with the indicated siRNAs along with GFP-H2B for chromosome observation. Images were analyzed by time-lapse microscopy using an inverted microscope. Frames were taken every 5 min for 3.5 h. The video is shown at 5 frames/s and corresponds to Fig. 3 D. Bars, 10 µm.