Li An FanDasnayanee ChandanayingyongAnajane G. SmithJohn A. HansenShanghai Second Medical UniversityMahidol UniversityUniversity of Washington School of MedicineFred Hutchinson Cancer Research Center2018-07-042018-07-041996-01-01Human Immunology. Vol.45, No.2 (1996), 143-147019888592-s2.0-0029924509https://repository.li.mahidol.ac.th/handle/20.500.14594/17643HLA-DR2 is the most common DR specificity (60.3%) identified in the Dai minority population of Xishuangbanna, Yunna Province, China. We characterized the DRB1, DRB5, DQA1, and DQB1 alleles of 44 unrelated DR2-positive individuals, 11 of whom (15%) were DR2 homozygous. Four DRB1 and four DRB5 alleles encoding DR2 were identified in this population. The most frequent DR2-associated DRB1 alleles were *1602 (gf = 0.164) and *1502 (gf = 0.151). DRB1*1501 (gf = 0.048) and a new allele designated DRB1*1504 (gf = 0.014) were also detected, but *1601 and *1503 were absent. The most frequent DR2-associated DRB5 alleles were *0101 (gf = 0.233) and *0102 (gf = 0.110). Nine different DR2-associated DR/DQ haplotypes were identified. The two most common DR2 haplotypes were DRB1*1602,DRB5*0101,DQA1*0102,DQB1*0502 (hf = 0.142) and DRB1*1502,DRB5*0102,DQA1*0101, DQB1*0501 (hf = 0.075). The new DRB1*1504 allele was found on a single haplotype: DRB1*1504, DRB5*0101,DQA1*0102,DQB1*0502 (hf = 0.017). The Dw2, Dw12, Dw21, and Dw22 haplotypes, present in many other Asian and Mongoloid populations, were not identified in this unique group. However, the Dai minority population is characterized by a relatively large number of diverse DR2 haplotypes and a new DRB1 allele encoding DR2.Mahidol UniversityImmunology and MicrobiologyMedicineArticleSCOPUS10.1016/0198-8859(95)00149-2