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PER3 rs33455: what the research says

rs33455
Trait
Moderate evidenceGene: PER3

Associated with individual variability in circadian phase and diurnal preference (extreme morningness vs eveningness chronotypes).

MAF ~0.35 in European populations.

Our full long-form research profile for rs33455 — genotype interpretations, evidence review, and FAQ — is being written and will appear on this page soon.

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