{{Rsnum
|rsid=2276314
|Gene=C18orf21
|Chromosome=18
|position=35977503
|Orientation=plus
|GMAF=0.242
|Gene_s=C18orf21
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
}}{{ population diversity
| geno1=(A;A)
| geno2=(A;G)
| geno3=(G;G)
| CEU | 61.1 | 36.3 | 2.7
| HCB | 50.4 | 40.1 | 9.5
| JPT | 52.2 | 40.7 | 7.1
| YRI | 42.9 | 43.5 | 13.6
| ASW | 45.6 | 50.9 | 3.5
| CHB | 50.4 | 40.1 | 9.5
| CHD | 54.1 | 37.6 | 8.3
| GIH | 70.3 | 24.8 | 5.0
| LWK | 45.5 | 43.6 | 10.9
| MEX | 69.0 | 25.9 | 5.2
| MKK | 52.6 | 41.0 | 6.4
| TSI | 62.7 | 33.3 | 3.9
| HapMapRevision=28
}}{{PMID Auto
|PMID=24223155
|Title=Genome wide analysis of drug-induced torsades de pointes: lack of common variants with large effect sizes
|OA=1
}}

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Affy GenomeWide 6}}
{{on chip | FTDNA}}
{{on chip | Illumina Human 1M}}