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Fig. 7. Cdk5 is required for polar localization of Cdc24. (A) Localization of Cdc24-GFP was analyzed in wild-type and cdk5ts cells grown in CMD at the permissive and restrictive temperatures. In wild-type and cdk5ts cells at the permissive temperature, Cdc24-GFP accumulates at the cell pole. By contrast, in cdk5ts cells at the restrictive temperature, Cdc24-GFP appears to be absent from the bud tip, although a diffuse fluorescence signal was present in the cytoplasm. (B) Quantification of Cdc24-GFP localization at the tip (mean ± s.e.m.; n=80 cells).