{{Rsnum
|rsid=2824495
|Gene=C21orf91
|Chromosome=21
|position=17796901
|Orientation=plus
|GMAF=0.2521
|Gene_s=C21orf91
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;G)
|geno3=(G;G)
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;G)
| geno3=(G;G)
| CEU | 4.6 | 30.8 | 64.6
| HCB | 15.6 | 46.7 | 37.8
| JPT | 11.4 | 50.0 | 38.6
| YRI | 3.2 | 36.5 | 60.3
| ASW | 0.0 | 0.0 | 0.0
| CHB | 15.6 | 46.7 | 37.8
| 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|22039568|OA=1
}} C21orf91 genotypes correlate with herpes simplex labialis (cold sore) frequency: description of a cold sore susceptibility gene.

{{GET Evidence
|gene=C21ORF91
|aa_change=Asn115Lys
|aa_change_short=N115K
|impact=not reviewed
|qualified_impact=Insufficiently evaluated not reviewed
|inheritance=unknown
|quality_scores=Array
|dbsnp_id=rs2824495
|overall_frequency_n=1920
|overall_frequency_d=9506
|overall_frequency=0.201978
|n_genomes=21
|n_genomes_annotated=0
|n_haplomes=23
|n_articles=0
|n_articles_annotated=0
|nblosum100=1
|autoscore=0
|webscore=N
}}

{{on chip | HumanOmni1Quad}}