Differential interference microscopy (DIC) image of PtK1 cell (marsupial kidney epithelial cell expressing dominant-negative Rac1(T17N). Live cells were used to study microtubule dynamics using X-rhodamine tubulin (injected at 1 mg/mL)and EGFP-Rac1(T17N) (expression vector injected into the cell nucleus at 100 ug/mL). Image corresponds to Fig 3 and microtubule dynamics correspond to Video 3 in J Cell Biol, 161:845-851, 2003. Video 3 is contained within the same image group as this figure.
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