{{Rsnum
|rsid=655888
|Gene=HTR2A
|Chromosome=13
|position=46854046
|Orientation=minus
|GMAF=0.3255
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
|Gene_s=HTR2A,HTR2A-AS1
}}{{ population diversity
| geno1=(A;A)
| geno2=(A;G)
| geno3=(G;G)
| CEU | 48.7 | 40.7 | 10.6
| HCB | 21.9 | 52.6 | 25.5
| JPT | 25.7 | 51.3 | 23.0
| YRI | 79.6 | 19.0 | 1.4
| ASW | 73.2 | 25.0 | 1.8
| CHB | 21.9 | 52.6 | 25.5
| CHD | 26.6 | 45.0 | 28.4
| GIH | 17.8 | 55.4 | 26.7
| LWK | 86.4 | 13.6 | 0.0
| MEX | 34.5 | 50.0 | 15.5
| MKK | 89.7 | 8.4 | 1.9
| TSI | 50.0 | 37.3 | 12.7
| HapMapRevision=28
}}Genetic evaluation of the serotonergic system in chronic fatigue syndrome.{{PMID|18079067}} Found that this is in linkage disequilibrium with [[rs643627]].

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Affy GenomeWide 6}}