Gene that makes people 'early to bed and early to rise' demystified

The recent discovery that a mutant "clock" gene made some people "early to bed and early to rise," a condition known as familial advanced sleep phase syndrome (FASPS), offered one of the first glimpses into the genetic basis of sleep in humans. Now, researchers report in the Jan. 12, 2007 issue of the journal Cell new evidence that helps to explain just how their bodies' natural alarm clocks get set to such an early wake-up time.

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