Synchronisation of mitosis in a cell division cycle mutant of Schizosaccharomyces pombe released from temperature arrest

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Abstract
When cultures of Schizosaccharomyces pombe cdc 2.33 were shifted to 25 °C, after 5 h at the restrictive temperature of 35 °C, cells entered cycles of synchronous division as judged by the appearance of peaks in the cell plate index at 1.5, 3, and 4.75 h. The timing and ultrastructural morphology of events occurring in such synchronous cultures were examined. Most cells underwent mitosis between 10 and 50 min after the temperature shift, with a maximal value after approximately 30 min. The ultrastructure of mitosis was consistent with previous descriptions of this process in wild-type cells.

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