CYP2D6*20 Allele

**Semantic type:** Gene or Genome

**Definition:** Human CYP2D6*20 allele is located in the vicinity of 22q13.1 and is approximately 4 kb in length. The CYP2D6*20 allele, a variant form of the CYP2D6 wild-type allele, encodes cytochrome P450 2D6*20 protein. The CYP2D6*20 allele exhibits a single nucleotide insertion (g.1973insG) that results in a frameshift during protein coding. This alteration abolishes the enzymatic activity of the cytochrome P450 2D6*20 protein.

**Synonyms:** - CYP2D6*20 - CYP2D6, g.1973insG - Cytochrome P450, Family 2, Subfamily D, Polypeptide 6*20 Allele