Figure 1.

Relationship between cytochrome P450 (CYP)2D6 mRNA levels and CYP2D6 copy number. The line represents unadjusted linear regression line for CYP2D6 copy number vs. mRNA levels (n = 114, after excluding one liver tissue sample that is homozygous for CYP2D6*5, and thus, the gene is deleted). N = 11, 94, 7, and 2 for copy number 1, 2, 3, and 4 groups, respectively.