Chunk #38 — The delta opioid receptor gene (OPRD1)
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In a study of 11 OPRD1 SNPs, three common SNPs in intron 1 (rs2236861, rs2236857 and rs3766951) and a haplotype block (SNPs rs204055, rs2236857 and rs2298896) showed associations with heroin addiction in EAs (Levran et al. 2008). No associations of these SNPs and heroin addiction were found in AAs (Levran et al. 2009).