Figure 1. Comparison of the nucleotide sequences spanning genomic regions that contain the crossing-over sites in Intron 3 of the three types of St^a alleles.

E and F are newly identified types in this study. Numbering of the nucleotides starts at the first nucleotide of the Intron 3. The locations of each recombination site of St^a variants are boxed. Positions of the nucleotides that are different in ordinary glycophorin genes and the variants are indicated.