Figure 1.
Linkage disequilibrium (LD) plot across the CLOCK gene. The horizontal white bar depicts the 113 kb DNA segment of chromosome 4q12 analysed in the sample. The 5 tagSNP locations are indicated by hatch marks. An LD plot is depicted in the bottom part of the figure: each diamond represents the magnitude of LD for a single pair of markers. Black indicates strong LD (r2 = 1.0); white indicates no LD (r2 = 0) and the grey tones indicate intermediate LD. The numbers inside the diamonds indicate the r2 (D’) value.