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Science 12 January 2001:
Vol. 291. no. 5502, pp. 226 - 227
DOI: 10.1126/science.291.5502.226B
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News of the Week

CIRCADIAN RHYTHMS:
Mutant Gene Speeds Up the Human Clock

Marina Chicurel

In a paper published online today by Science (www.scienceexpress.org), researchers identify a genetic mutation that causes people to be extreme early birds, rising, say, at 4:00 a.m. The discovery opens a window into the genetic basis of the human circadian clock, which keeps body activities such as sleeping and eating running on a roughly 24-hour rhythm.

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