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Chunk #26 — RESULTS — Genetic association analyses

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Multiple distinct risk loci for nicotine dependence identified by dense coverage of the complete family of nicotinic receptor subunit (CHRN) genes.
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The CHRND gene contains one SNP significant after multiple test correction. This SNP, rs12466358 (p = 0.00027), is a singleton bin in our data, although other SNPs have r2 ≥ 0.6 (but less than 0.8) with it (Figure 3C). It is noteworthy that the next most significant SNP in the CHRND-CHRNG cluster, rs1881492 (p = 0.00069) is uncorrelated with rs12466358 (r2 = 0.086), suggesting that there is a second distinct risk allele in this gene cluster, although this second signal does not meet our multiple test correction criterion.