FIG. 1.

Linkage disequilibrium between each pairwise combination of the 9 genotyped single-nucleotide polymorphisms (SNPs) in brain-derived neurotrophic factor (BDNF). The heavy black outline indicates that all the SNPs belong to a single haploblock. The numbers in the squares are measures of linkage disequilibrium, D’. Red squares indicate high linkage disequilibrium. Grey lines indicate the relative position in BDNF. Grey boxes in the gene diagram represent exons, and the line represents an intron. Vertical lines represent the locations of SNPs.