Figure 2From: Study of the serotonin transporter (SLC6A4) and BDNF genes in French patients with non syndromic mental deficiency Linkage disequilibrium (LD) map of four polymorphic markers in SLC6A4 gene in control and NS-MD patients. In each square, the normalized linkage disequilibrium measures (D') corresponding to each pair of markers are indicated. Squares are in black if the D' values are ≥ 80% (strong LD) and in grey if the D' values are between 50-80%.Back to article page