{{Rsnum
|rsid=55889066
|Orientation=plus
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
|Chromosome=15
|position=74753234
|Gene=CYP1A2
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|Gene_s=CYP1A2
}}[[rs55889066]], also known as 3497G>A or C406Y, is a SNP in the [[CYP1A2]] gene.

The [[rs55889066]](A) allele defines the CYP1A2*5 variant.

{{PharmGKB
|RSID=rs55889066
|Name_s=CYP1A2:Cys406Tyr, CYP1A2*5, rs55889066 G>A
|Gene_s=CYP1A2
|Feature=Exon
|Evidence=PubMed ID:20125119
|Annotation=Risk or phenotype-associated allele: A Phenotype: In an in vitro system, this variant showed no catalytic activity against the carcinogen NNK. The wild type protein bioactivates this carcinogen. The variant also produced extra metabolites of phenacetin that were not observed with the wild type protein. Type of association: FA
|Drugs=phenacetin
|Drug Classes=
|Diseases=Neoplasms
|Curation Level=Curated
|PharmGKB Accession ID=PA165282107
}}

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