{{Rsnum
|rsid=2256871
|Gene=CYP2C9
|Chromosome=10
|position=96708974
|Orientation=minus
|ReferenceAllele=A
|MissenseAllele=G
|GMAF=0.02617
|Assembly=GRCh37
|GenomeBuild=37.1
|dbSNPBuild=131
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
}}
{{ population diversity
| geno1=(C;C)
| geno2=(C;T)
| geno3=(T;T)
| CEU | 0.0 | 1.5 | 98.5
| HCB | 0.0 | 0.0 | 100.0
| JPT | 0.0 | 0.0 | 100.0
| YRI | 0.0 | 15.9 | 84.1
| ASW | 0.0 | 0.0 | 0.0
| CHB | 0.0 | 0.0 | 100.0
| 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
}}[[rs2256871]], also known as 752A>G, 10535A>G or H251R, is a SNP in the [[CYP2C9]] gene.

The [[rs2256871]](C) allele defines the CYP2C9*9 variant.

{{GET Evidence
|gene=CYP2C9
|aa_change=His251Arg
|aa_change_short=H251R
|impact=not reviewed
|qualified_impact=Insufficiently evaluated not reviewed
|inheritance=unknown
|quality_scores=Array
|dbsnp_id=rs2256871
|overall_frequency_n=296
|overall_frequency_d=10758
|overall_frequency=0.0275144
|n_genomes=5
|n_genomes_annotated=0
|n_haplomes=5
|n_articles=0
|n_articles_annotated=0
|pph2_score=0.947
|nblosum100=1
|autoscore=2
|webscore=N
}}

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | FTDNA2}}
{{on chip | FTDNA}}
{{on chip | HumanOmni1Quad}}