Analysis of a Larger SNP Dataset from the HapMap Project Confirmed That the Modern Human A Allele of the ABO Blood Group Genes Is a Descendant of a Recombinant between B and O Alleles
Figure 2
The location of SNP sites on the human ABO blood group genes obtained by the HapMap Project. A dashed line indicates Δ261, and blue vertical lines indicate the two critical sites that determine the blood group A and B specificities. The SNP number is shown in the Supplementary Material.