Researchers find gene variants linked to sleep habits, time of death

11/19/2012 | American City Business Journals

Researchers at the Beth Israel Deaconess Medical Center reported in the journal Annals of Neurology that they have identified a common gene variant that regulates the body's circadian clock. "The internal 'biological clock' regulates many aspects of human biology and behavior, such as preferred sleep times, times of peak cognitive performance, and the timing of many physiological processes," said lead author Andrew Lim. Researchers found that people with the A-A variation wake up about an hour earlier than those with the G-G variation, who wake up latest in the morning and die latest in the day.

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