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Growth rates and morphologies of temperature-sensitive cak1, cdc28, and kin28 mutants. (A) Isogenic strains carrying the indicated mutations were grown to mid-log phase at 25°C and switched to 37°C at time zero. At the indicated times, the cells were counted with a hemocytometer. (B) The indicated strains were grown for 3 h at 37°C and analyzed by Nomarski microscopy.
