Comparison of SNP sequence among HLA-DPB1 haplotypes. One representative individual haplotype from each haplotype group was compared with the HLA-DPB1*02:01 haplotype. Each row indicates 1 haplotype. Aqua, identical SNPs to the alleles of HLA-DPB1*02:01 haplotype; red, SNPs that differ from them; cobalt blue, SNP and yellow SNP at 3′UTR of HLA-DPB1 gene indicate the rs9277534 A allele and G alleles, respectively; dashed lines, location of SNPs within the HLA-DPB1 gene.