{{Rsnum
|rsid=1811399
|Gene=NPAS2
|Chromosome=2
|position=100862552
|Orientation=minus
|GMAF=0.281
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(G;G)
|geno2=(G;T)
|geno3=(T;T)
|Gene_s=NPAS2
}}{{ population diversity
| geno1=(G;G)
| geno2=(G;T)
| geno3=(T;T)
| CEU | 8.0 | 27.4 | 64.6
| HCB | 12.4 | 40.9 | 46.7
| JPT | 9.7 | 49.6 | 40.7
| YRI | 8.8 | 46.9 | 44.2
| ASW | 15.8 | 35.1 | 49.1
| CHB | 12.4 | 40.9 | 46.7
| CHD | 9.2 | 45.0 | 45.9
| GIH | 11.9 | 30.7 | 57.4
| LWK | 4.5 | 43.6 | 51.8
| MEX | 17.2 | 37.9 | 44.8
| MKK | 9.0 | 42.9 | 48.1
| TSI | 4.9 | 32.4 | 62.7
| HapMapRevision=28
}}[http://precedings.nature.com/documents/2366/version/1 nature] The inheritance of the AC haplotype of [[rs1861972]] – [[rs1861973]], the C allele of [[rs1811399]], and the C allele of [[rs1234747]] may contribute to [[autism]] by affecting [[microRNA]]

{{PMID Auto
|PMID=17264841
|Title=Association of Per1 and Npas2 with autistic disorder: support for the clock genes/social timing hypothesis.
}}

{{PMID Auto
|PMID=20174623
|Title=Systematic analysis of circadian genes in a population-based sample reveals association of TIMELESS with depression and sleep disturbance.
|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 | HumanOmni1Quad}}
{{on chip | Illumina Human 1M}}