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    GlossaryPeriod Circadian Regulator 2 (PER2)

    protein regulating the body's internal 24-hour circadian rhythm

    Period Circadian Regulator 2 (PER2) is a protein that plays a crucial role in regulating the body's internal clock, or circadian rhythm. This protein helps control the timing of various physiological processes, such as sleep-wake cycles, hormone release, and metabolism, by interacting with other circadian proteins to maintain a roughly 24-hour cycle.

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