{{Rsnum
|rsid=3758581
|Gene=CYP2C19
|Chromosome=10
|position=96602623
|Orientation=plus
|ReferenceAllele=A
|MissenseAllele=G
|GMAF=0.0427
|Assembly=GRCh37
|GenomeBuild=37.1
|dbSNPBuild=131
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
}}
{{ population diversity
| geno1=(A;A)
| geno2=(A;G)
| geno3=(G;G)
| CEU | 0.0 | 9.4 | 90.6
| HCB | 2.2 | 8.9 | 88.9
| JPT | 2.3 | 15.9 | 81.8
| YRI | 0.0 | 0.0 | 100.0
| ASW | 0.0 | 0.0 | 0.0
| CHB | 2.2 | 8.9 | 88.9
| 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
}}The [[rs3758581]](A) SNP defines a [[CYP2C19]] allele known as V331I.

{{PMID|21071160}} Analysis of 50 SNPs in CYP2D6, CYP2C19, CYP2C9, CYP3A4 and CYP1A2 by MALDI-TOF mass spectrometry in Chinese Han population.

{{GET Evidence
|gene=CYP2C19
|aa_change=Val331Ile
|aa_change_short=V331I
|impact=not reviewed
|qualified_impact=Insufficiently evaluated not reviewed
|inheritance=unknown
|quality_scores=Array
|dbsnp_id=rs3758581
|overall_frequency_n=3
|overall_frequency_d=128
|overall_frequency=0.0234375
|n_genomes=1
|n_genomes_annotated=0
|n_haplomes=1
|n_articles=0
|n_articles_annotated=0
|nblosum100=-4
|autoscore=1
|webscore=N
}}

{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}