NCIt 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.;