{{Rsnum
|rsid=56256500
|Gene=CYP2A6
|Chromosome=19
|position=40848266
|Orientation=plus
|GMAF=0.003214
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
|Gene_s=CYP2A6
}}{{PharmGKB
|RSID=rs56256500
|Name_s=CYP2A6:2161C>T;CYP2A6:R203C;CYP2A6*23
|Gene_s=CYP2A6
|Feature=
|Evidence=PubMed ID:18216723
|Annotation=This SNP has been associated with impaired CYP2A6 enzyme function in vitro and in vivo and may be associated with a lower risk of smoking in individuals of Black-African descent.
|Drugs=nicotine
|Drug Classes=
|Diseases=
|Curation Level=Curated
|PharmGKB Accession ID=PA162356044
}}{{PMID Auto
|PMID=23130019
|Title=Frequencies of 23 functionally significant variant alleles related with metabolism of antineoplastic drugs in the chilean population: comparison with caucasian and asian populations.
|OA=1
}}