{{Rsnum
|rsid=2230201
|Gene=C3
|Chromosome=19
|position=6713280
|Orientation=minus
|ReferenceAllele=G
|GMAF=0.2222
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
|Gene_s=C3
}}{{ population diversity
| geno1=(A;A)
| geno2=(A;G)
| geno3=(G;G)
| CEU | 0.0 | 0.0 | 100.0
| HCB | 0.0 | 0.0 | 100.0
| JPT | 0.0 | 0.0 | 100.0
| YRI | 0.0 | 0.0 | 100.0
| ASW | 0.0 | 0.0 | 0.0
| CHB | 0.0 | 0.0 | 100.0
| 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
}}
In ~500 Japanese SLE patients, the (G) allele of [[rs2230201]], a SNP in the [[C3]] gene, is associated with higher risk for systemic [[lupus]] erythematosus (SLE). The odds ratio is 1.19 (CI: 1.01-1.41, p=0.038).{{PMID|18174230}}

{{ neighbor
| rsid = 1047286
| distance = 29
}}

{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | FTDNA2}}
{{on chip | HumanOmni1Quad}}