{{Rsnum
|rsid=2055979
|Gene=IL21
|Chromosome=4
|position=122619586
|Orientation=plus
|GMAF=0.2594
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(G;G)
|geno2=(G;T)
|geno3=(T;T)
|Gene_s=IL21,IL21-AS1
}}{{ population diversity
| geno1=(G;G)
| geno2=(G;T)
| geno3=(T;T)
| CEU | 49.2 | 47.7 | 3.1
| HCB | 57.8 | 26.7 | 15.6
| JPT | 42.9 | 40.5 | 16.7
| YRI | 95.0 | 3.3 | 1.7
| ASW | 0.0 | 0.0 | 0.0
| CHB | 57.8 | 26.7 | 15.6
| 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
}}{{PMID Auto
|PMID=21648020
|Title=Haplotype-based analysis of ulcerative colitis risk loci identifies both IL2 and IL21 as susceptibility genes in Han Chinese
}}
{{PMID Auto
|PMID=24434811
|Title=The association of Interleukin-21 polymorphisms with Interleukin-21 serum levels and risk of systemic lupus erythematosus
}}