Fig. 1

Genomic structure of TPH-2, including relative location of 4 SNPs studied and linkage disequilibrium (LD) of these four SNPs in the oppositional defiant disorder (ODD) and control groups. The LD between pairwise SNPs, using D′ (left, red color) and r² (right, gray color) values, are shown separately for cases and controls. High levels of LD are represented by increasing scale intensity from 0 to 100, as shown by the bars