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Science 4 August 2006:
Vol. 313. no. 5787, pp. 624 - 625
DOI: 10.1126/science.1131625
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Perspectives

CELL BIOLOGY:
Extinguishing a Cell Cycle Checkpoint

M. Andrew Hoyt

The steps in cell division are precisely orchestrated. A key checkpoint is inactivated after it has performed its function so that the next steps can take place.

The author is in the Department of Biology, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA. E-mail: hoyt{at}jhu.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)