{{Rsnum
|rsid=638944
|Gene=DHCR24
|Chromosome=1
|position=54876242
|Orientation=plus
|GMAF=0.4761
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(G;G)
|geno2=(G;T)
|geno3=(T;T)
|Gene_s=DHCR24
}}{{ population diversity
| geno1=(G;G)
| geno2=(G;T)
| geno3=(T;T)
| CEU | 36.3 | 52.2 | 11.5
| HCB | 15.3 | 47.4 | 37.2
| JPT | 15.0 | 51.3 | 33.6
| YRI | 5.4 | 44.2 | 50.3
| ASW | 10.5 | 52.6 | 36.8
| CHB | 15.3 | 47.4 | 37.2
| CHD | 13.8 | 48.6 | 37.6
| GIH | 54.5 | 34.7 | 10.9
| LWK | 15.5 | 40.9 | 43.6
| MEX | 19.0 | 58.6 | 22.4
| MKK | 13.5 | 48.1 | 38.5
| TSI | 23.5 | 55.9 | 20.6
| HapMapRevision=28
}}{{PMID|17510943}}  [[rs638944]](T) and [[rs600491]](C) [[Alzheimer's disease]] protective haplotype TC with frequency of 0.22 in cases and 0.30 in controls (P < 0.001) 

{{PMID|17510943}} [[rs638944]](G) and [[rs600491]](C) [[Alzheimer's disease]] risk haplotype GC with frequency of 0.10 in cases and 0.05 in controls (P < 0.001)

{{PMID Auto
|PMID=15986317
|Title=Identification of risk and age-at-onset genes on chromosome 1p in Parkinson disease.
|OA=1
}}

{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Affy GenomeWide 6}}
{{on chip | FTDNA2}}
{{on chip | HumanOmni1Quad}}