Contact: Caroline Perry
Caption: The top shows a series of fluorescent images of a spindle taken before the cut and at 5 seconds and 10 seconds after the cut. Scale bar, 10 Ám. The bottom shows a graphical representation of the cut microtubules. The cut generates new 'plus' ends (red) and new 'minus' ends (green). The newly generated minus ends remain stable, whereas the new plus ends depolymerize, which creates two depolymerization fronts of opposed polarity.
Credit: Jan BruguÚs, Harvard School of Engineering and Applied Sciences.
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