HLA-DR RFLP distributions in two groups of aboriginal Australians.

HLA-DR and -DQ typing by restriction fragment length polymorphism (RFLP) in Aboriginal Australians from the Kimberleys and from Coen shows a restricted number of HLA-DR types in these populations. The polymorphism is essentially limited to DR2, DR4, DRw14 and DRw8. The most common DR.DQ RFLP haplotype in Aborigines shows a novel arrangement of DR and DQ alleles that has important implications for histocompatibility matching if the RFLP patterns reflect functional variation in HLA class II molecules.