Figure 3. The structure of the OPRM1 gene and location of the polymorphisms.
A- Exon-intron structure of the OPRM1 gene reported in Wendel and Hoehe (1998). The position of the ATG initiation codon is indicated. The numbering of the polymorphism position is based upon a system that gives value +1 to the first nucleotide of this codon; bases belonging to the coding region have positive values; bases belonging to the upstream 5’ to the initiation codon have negative values. The protein coding region is indicated in black.
B- The structure of OPRM1 mRNA. The protein coding region is indicated in black.
C- The seven transmembrane domain structure of the OPRM1 protein. Transmembrane domains (TM1-TM7) are indicated in rectangles.