Graphical representation of the LD structure of the ADH1C gene for the Asian populations. The LD structure, spanning 233 kb, was constructed using the Asian genotype data of 232 SNPs. Vertical tick marks above the name indicate the relative genomic position of each SNP. The LD structure represents the pairwise calculation of D’ for each possible combination of SNPs. D’ < 0.5 is shown in white, D’ = 1.0 in dark red, with increasing shades of red representing increasing D’ between the SNPs. The genes from left to right are ADH6, ADH1A, ADH1B, ADH1C and ADH7. The ADH1C gene, and ADH1C Ile350Val are shown in red; the selected ADH1C nonsynonymous SNPs are shown in blue; and the other genes are in black.