{{Rsnum
|rsid=3749474
|Gene=CLOCK
|Chromosome=4
|position=55434518
|Orientation=plus
|GMAF=0.3852
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|Gene_s=CLOCK
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;T)
| geno3=(T;T)
| CEU | 36.6 | 50.0 | 13.4
| HCB | 16.4 | 44.0 | 39.6
| JPT | 14.3 | 52.7 | 33.0
| YRI | 68.7 | 28.6 | 2.7
| ASW | 59.6 | 40.4 | 0.0
| CHB | 16.4 | 44.0 | 39.6
| CHD | 14.7 | 44.0 | 41.3
| GIH | 30.7 | 51.5 | 17.8
| LWK | 76.9 | 21.3 | 1.9
| MEX | 35.7 | 44.6 | 19.6
| MKK | 59.6 | 37.8 | 2.6
| TSI | 42.2 | 45.1 | 12.7
| HapMapRevision=28
}}{{PMID Auto
|PMID=21773969
|Title=Functional polymorphisms of circadian positive feedback regulation genes and clinical outcome of Chinese patients with resected colorectal cancer
}}

{{PMID Auto
|PMID=19888304
|Title=Genetic variants in human CLOCK associate with total energy intake and cytokine sleep factors in overweight subjects (GOLDN population).
|OA=1
}}

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

{{PMID Auto
|PMID=21172166
|Title=Pharmacogenetics of antidepressant response.
|OA=1
}}

{{PMID Auto
|PMID=23822714
|Title=Analysis of polymorphisms in the circadian-related genes and breast cancer risk in the Norwegian nurses working night shifts
|OA=1
}}

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | FTDNA2}}
{{on chip | FTDNA}}
{{on chip | Illumina Human 1M}}