Jet lag: It's all about chemical reactions in cells

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This graphic of the ribbon structure of the vivid protein with a rising sun signifies the circadian clock (24-hour cycle). Credit: Cornell University
This graphic of the ribbon structure of the vivid protein with a rising sun signifies the circadian clock (24-hour cycle). Credit: Cornell University

Circadian clocks regulate the timing of biological functions in almost all higher organisms. Anyone who has flown through several time zones knows the jet lag that can result when this timing is disrupted.


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