{{Rsnum
|rsid=366510
|Gene=C3
|Chromosome=19
|position=6697818
|Orientation=plus
|GMAF=0.2732
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(G;G)
|geno2=(G;T)
|geno3=(T;T)
|Gene_s=C3
}}{{ population diversity
| geno1=(G;G)
| geno2=(G;T)
| geno3=(T;T)
| CEU | 15.9 | 49.6 | 34.5
| HCB | 0.7 | 23.4 | 75.9
| JPT | 2.7 | 20.4 | 77.0
| YRI | 16.4 | 39.7 | 43.8
| ASW | 7.0 | 40.4 | 52.6
| CHB | 0.7 | 23.4 | 75.9
| CHD | 1.8 | 23.9 | 74.3
| GIH | 6.9 | 42.6 | 50.5
| LWK | 2.8 | 33.0 | 64.2
| MEX | 1.7 | 29.3 | 69.0
| MKK | 7.1 | 40.4 | 52.6
| TSI | 10.8 | 44.1 | 45.1
| HapMapRevision=28
}}{{PMID Auto
|PMID=16355111
|Title=Variants in the gene encoding C3 are associated with asthma and related phenotypes among African Caribbean families.
}}

{{PMID Auto
|PMID=18631248
|Title=Polymorphisms within the C3 gene are associated with specific IgE levels to common allergens and super-antigens among atopic dermatitis patients.
}}

{{PMID Auto
|PMID=21462136
|Title=[Association of the C3 gene polymorphisms with susceptibility to adult asthma].
}}

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