{{Rsnum
|rsid=3802780
|Gene=CTTN
|Chromosome=11
|position=70434886
|Orientation=minus
|GMAF=0.1579
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|effect1=
|effect2=
|effect3=
|Gene_s=CTTN
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;T)
| geno3=(T;T)
| CEU | 75.0 | 23.4 | 1.6
| HCB | 100.0 | 0.0 | 0.0
| JPT | 100.0 | 0.0 | 0.0
| YRI | 49.2 | 41.3 | 9.5
| ASW | 0.0 | 0.0 | 0.0
| CHB | 100.0 | 0.0 | 0.0
| 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
}}

[[rs3802780]] was significantly associated with severe [[asthma]] (odds ratio 1.71, CI: 1.20-2.43;, p=0.003) based on a study of individuals of European and African descent.{{PMID|18521921|OA=1
}}

{{on chip | FTDNA2}}
{{on chip | HumanOmni1Quad}}