A DPB1 typing method is described that assigns DPB1 alleles into six g
roups based on polymorphism at amino acid positions 8-9 and 84-87 usin
g sequence-specific priming (SSP). The results obtained allow the sele
ction of primers for a subsequent sequence-specific oligonucleotide (S
SO) hybridization procedure which permits DPB1 alleles to be analysed
separately in a heterozygote individual. This has greatly reduced the
occurrence of typing reaction patterns consistent with multiple combin
ations of DPB1 alleles seen in other DPB1 typing methods.