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DNA-RFLP analysis and genotyping of HLA-DR alleles in the south of Spain.

42 healthy individuals previously HLA-DR typed by serology, were HLA class II typed using RFLPs. The pattern of hybridization revealed allele specific DNA fragments for some DR specificities. Three fragments highly associated with HLA-DR antigens: a 7 kb RFLP with DR1; a 10 kb RFLP with DR-3/DR-5 and a 13 kb band with DR4/DR7.