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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: Mol Psychiatry. 2008 Apr 15;14(5):501–510. doi: 10.1038/mp.2008.42

Figure 1.

Figure 1

(a) Location of genotyped polymorphisms across the cluster of CHRNA5–CHRNA3–CHRNB4 genes. The dark boxes represent exons. The hatched boxes represent 5′- and 3′-UTRs; * represents coding single nucleotide polymorphisms (SNPs). Diagram is not drawn to scale. (b) Pair-wise linkage disequilibrium among polymorphisms in the region of CHRNA5–CHRNA3–CHRNB4 genes in COGA European-American data set. Numbers in boxes represent r2 value between variants.