{{Rsnum
|rsid = 74644586
|geno1=(C;C)
|geno2=(C;G)
|geno3=(G;G)
|Chromosome=22
|Orientation=minus
|Gene=CYP2D6
|position=42526571
|Assembly=GRCh37
|GenomeBuild=37.1
|dbSNPBuild=131
}}a variation in [[CYP2D6]]