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Science 313 (5787): 624-625

Copyright © 2006 by the American Association for the Advancement of Science

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}

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Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882