{{Rsnum
|rsid=3181097
|Gene=CD28
|Chromosome=2
|position=203705416
|Orientation=plus
|GMAF=0.2002
|Gene_s=CD28
|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 | 0.0 | 8.0 | 92.0
| HCB | 24.1 | 51.1 | 24.8
| JPT | 18.6 | 54.0 | 27.4
| YRI | 4.1 | 38.1 | 57.8
| ASW | 3.5 | 31.6 | 64.9
| CHB | 24.1 | 51.1 | 24.8
| CHD | 21.1 | 46.8 | 32.1
| GIH | 2.0 | 10.9 | 87.1
| LWK | 4.5 | 42.7 | 52.7
| MEX | 0.0 | 22.4 | 77.6
| MKK | 6.4 | 40.4 | 53.2
| TSI | 0.0 | 3.9 | 96.1
| HapMapRevision=28
}}{{PMID Auto
|PMID=22977635
|Title=Association study between polymorphisms of CD28, CTLA4 and ICOS and non-segmental vitiligo in a Korean population
|OA=1
}}

{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Affy GenomeWide 6}}
{{on chip | FTDNA2}}
{{on chip | HumanOmni1Quad}}
{{on chip | Illumina Human 1M}}