Figure 1From: Genetic variation in the Catechol-O-Methyltransferase (COMT) gene and morphine requirements in cancer patients with painSchematic diagram of the COMT gene. Schematic diagram of the catechol-O-methyltransferase (COMT) gene, labeled with the 11 SNPs analysed in the present study. *Rs2075507 has recently been revised, the former SNP number was Rs2097603. Exon 1 and exon 2 are non-coding.Back to article page