{{Rsnum
|rsid=2304672
|Gene=PER2
|Chromosome=2
|position=238277948
|Orientation=minus
|GMAF=0.07897
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;G)
|geno3=(G;G)
|Gene_s=PER2
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;G)
| geno3=(G;G)
| CEU | 78.8 | 21.2 | 0.0
| HCB | 90.5 | 7.3 | 2.2
| JPT | 89.4 | 10.6 | 0.0
| YRI | 77.6 | 21.1 | 1.4
| ASW | 84.2 | 15.8 | 0.0
| CHB | 90.5 | 7.3 | 2.2
| CHD | 93.6 | 5.5 | 0.9
| GIH | 80.2 | 14.9 | 5.0
| LWK | 83.6 | 15.5 | 0.9
| MEX | 91.4 | 8.6 | 0.0
| MKK | 89.7 | 10.3 | 0.0
| TSI | 78.4 | 21.6 | 0.0
| HapMapRevision=28
}}{{PMID Auto
|PMID=20497782
|Title=PERIOD2 variants are associated with abdominal obesity, psycho-behavioral factors, and attrition in the dietary treatment of obesity
}}

{{PMID Auto
|PMID=22517501
|Title=Rotating night shift work and polymorphism of genes important for the regulation of circadian rhythm
}}

{{PMID Auto
|PMID=22623394
|Title=A Period 2 Genetic Variant Interacts with Plasma SFA to Modify Plasma Lipid Concentrations in Adults with Metabolic Syndrome
}}

{{PMID Auto
|PMID=19166596
|Title=Circadian polymorphisms associated with affective disorders.
|OA=1
}}

{{PMID Auto
|PMID=19470168
|Title=NPAS2 and PER2 are linked to risk factors of the metabolic syndrome.
|OA=1
}}

{{PMID Auto
|PMID=20180986
|Title=CLOCK is suggested to associate with comorbid alcohol use and depressive disorders.
|OA=1
}}

{{PMID Auto
|PMID=20931356
|Title=PER2 variation is associated with diurnal preference in a Korean young population.
|OA=1
}}

{{PMID Auto
|PMID=22137505
|Title=PER2 rs2304672 polymorphism moderates circadian-relevant reward circuitry activity in adolescents.
|OA=1
}}

{{PMID Auto
|PMID=24892753
|Title=PER2 rs2304672, CLOCK rs1801260, and PER3 rs57875989 polymorphisms are not associated with juvenile myoclonic epilepsy
}}

{{PMID Auto
|PMID=25020710
|Title=P324Circadian genes in the regulation of lipids in coronary artery disease
}}
{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Affy GenomeWide 6}}
{{on chip | HumanOmni1Quad}}