{{Rsnum
|rsid=998850
|Gene=DDC
|Chromosome=7
|position=50539690
|Orientation=minus
|GMAF=0.4096
|Gene_s=DDC,RGPD2
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;G)
|geno3=(G;G)
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;G)
| geno3=(G;G)
| CEU | 22.2 | 55.6 | 22.2
| HCB | 35.6 | 44.4 | 20.0
| JPT | 33.3 | 48.9 | 17.8
| YRI | 55.6 | 36.5 | 7.9
| ASW | 0.0 | 0.0 | 0.0
| CHB | 35.6 | 44.4 | 20.0
| CHD | 0.0 | 0.0 | 0.0
| GIH | 0.0 | 0.0 | 0.0
| LWK | 0.0 | 0.0 | 0.0
| MEX | 0.0 | 0.0 | 0.0
| MKK | 0.0 | 0.0 | 0.0
| TSI | 0.0 | 0.0 | 0.0
| HapMapRevision=28
}}
{{PMID Auto
|PMID=19221445
|Title=Tyrosine hydroxylase and DOPA decarboxylase gene variants in personality traits
}}

{{PMID Auto
|PMID=17948905
|Title=Dopa decarboxylase and tyrosine hydroxylase gene variants in suicidal behavior.
}}

{{PMID Auto
|PMID=19184136
|Title=Examination of association of genes in the serotonin system to autism.
|OA=1
}}

{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}