Impaired expression of CYP2D6 in intermediate metabolizers carrying the *41 allele caused by the intronic SNP 2988G>A: evidence for modulation of splicing events.

Abstract excerpt

We investigated the molecular basis for low expression and activity of CYP2D6 associated with the CYP2D6*41 allele in about 10-15% of Caucasians with intermediate metabolizer phenotype. With respect to two previously described polymorphisms in the promoter (-1584C>G) and in intron 6 (2988G>A; c.985+39G>A), the three most frequent functional alleles have the distinct haplotypes 2D6*1[CG], 2D6*2[GG] and 2D6*41[CA],...

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