CYP2D6*40 Allele

**Semantic type:** Gene or Genome

**Definition:** Human CYP2D6*40 allele is located in the vicinity of 22q13.1 and is approximately 4 kb in length. This allele, a variant form of the CYP2D6 wild-type allele, encodes cytochrome P450 2D6*40 protein. The CYP2D6*40 allele exhibits an 18 nucleotide insertion (g.1863insTTTCGCCCCTTTCGCCCC) that abolishes the enzymatic activity of the cytochrome P450 2D6*40 protein.

**Synonyms:** - CYP2D6*40 - CYP2D6, g.1863insTTTCGCCCCTTTCGCCCC - Cytochrome P450, Family 2, Subfamily D, Polypeptide 6*40 Allele