{{Rsnum
|rsid=3745568
|Gene=C3
|Chromosome=19
|position=6690602
|Orientation=minus
|GMAF=0.06703
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(A;A)
|geno2=(A;C)
|geno3=(C;C)
|Gene_s=C3
}}{{ population diversity
| geno1=(A;A)
| geno2=(A;C)
| geno3=(C;C)
| CEU | 78.8 | 19.5 | 1.8
| HCB | 86.1 | 13.1 | 0.7
| JPT | 88.5 | 10.6 | 0.9
| YRI | 100.0 | 0.0 | 0.0
| ASW | 98.2 | 1.8 | 0.0
| CHB | 86.1 | 13.1 | 0.7
| CHD | 85.3 | 14.7 | 0.0
| GIH | 80.2 | 19.8 | 0.0
| LWK | 99.1 | 0.9 | 0.0
| MEX | 93.1 | 6.9 | 0.0
| MKK | 98.1 | 1.9 | 0.0
| TSI | 78.4 | 20.6 | 1.0
| HapMapRevision=28
}}{{PMID Auto
|PMID=19387462
|Title=The heritability and genetics of complement C3 expression in UK SLE families
}}

{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Illumina Human 1M}}