Scientific background:

Methodology:

Literature: 

Gough AC et al. (1990) Identification of the primary gene defect at the cytochrome P450 CYP2D locus.
Hanioka N et al. (1990) The human CYP2D locus associated with a common genetic defect in drug oxidation: a G1934----A base change in intron 3 of a mutant CYP2D6 allele results in an aberrant 3' splice recognition site.
Kagimoto M et al. (1990) Multiple mutations of the human cytochrome P450IID6 gene (CYP2D6) in poor metabolizers of debrisoquine. Study of the functional significance of individual mutations by expression of chimeric genes.
Chen X et al. (1995) The CYP2D6B allele is associated with a milder synaptic pathology in Alzheimer's disease.
Gaedigk A et al. (1991) Deletion of the entire cytochrome P450 CYP2D6 gene as a cause of impaired drug metabolism in poor metabolizers of the debrisoquine/sparteine polymorphism.
Steen VM et al. (1995) Homologous unequal cross-over involving a 2.8 kb direct repeat as a mechanism for the generation of allelic variants of human cytochrome P450 CYP2D6 gene.
Idle JR et al. (2000) Medical implications of HGP's sequence of chromosome 22.
Nelson DR et al. (2004) Comparison of cytochrome P450 (CYP) genes from the mouse and human genomes, including nomenclature recommendations for genes, pseudogenes and alternative-splice variants.
Saxena R et al. (1994) Identification of a new variant CYP2D6 allele with a single base deletion in exon 3 and its association with the poor metabolizer phenotype.
Broly F et al. (1995) A nonsense mutation in the cytochrome P450 CYP2D6 gene identified in a Caucasian with an enzyme deficiency.
Kagimoto M et al. (1990) Multiple mutations of the human cytochrome P450IID6 gene (CYP2D6) in poor metabolizers of debrisoquine. Study of the functional significance of individual mutations by expression of chimeric genes.
Nakamura K et al. (2002) CYP2D6.10 present in human liver microsomes shows low catalytic activity and thermal stability.
Marez D et al. (1997) Polymorphism of the cytochrome P450 CYP2D6 gene in a European population: characterization of 48 mutations and 53 alleles, their frequencies and evolution.
Johansson I et al. (1993) Inherited amplification of an active gene in the cytochrome P450 CYP2D locus as a cause of ultrarapid metabolism of debrisoquine.
Panserat S et al. (1994) DNA haplotype-dependent differences in the amino acid sequence of debrisoquine 4-hydroxylase (CYP2D6): evidence for two major allozymes in extensive metabolisers.
Gasche Y et al. (2004) Codeine intoxication associated with ultrarapid CYP2D6 metabolism.
Desmeules J et al. (1991) Impact of environmental and genetic factors on codeine analgesia.
Yue QY et al. (1997) Quantification of the O- and N-demethylated and the glucuronidated metabolites of codeine relative to the debrisoquine metabolic ratio in urine in ultrarapid, rapid, and poor debrisoquine hydroxylators.
Koren G et al. (2006) Pharmacogenetics of morphine poisoning in a breastfed neonate of a codeine-prescribed mother.