Figure 1From: Does pathway analysis make it easier for common variants to tag rare ones?Linkage disequilibrium of 125 SNPs using r2 in the VEGF pathway. The low r2 ≈ 0 values (white cells) show weak correlations between the SNPs. The white cells indicate absence of LD (r2 = 0), shades of grey intermediate degree of LD (0 <r2 < 1), and black cells high LD (r2 = 1).Back to article page