Identification of two new alleles HLA-DRB1*0312, DRB1*0432 and of a DRB3-negative DRB1*1313-positive haplotype

Two new HLA-DRB1 alleles were identified in the course of routine class II molecular typing in Dutch Caucasoid, HLA-DRB1*0312 is similar to *03011 except for codon 57 (GAT-->AGC), DRB1*0432 is similar to *0413 but with a mutation ai position 215, changing codon 72 (CGG-->CAG; Arg-->Gln). This sequence has never before been identified at this position. A DRB3-negative DRB1*1313 haplotype was identified in an individual from Indonesia. Monoclonal antibodies against DR52 were nonreactive with lymphocytes of this individual. The DRB1*1313-DRB3-negative haplotype probably represents a recombination of DRB1*13 and *08 haplotypes where the sequences telomeric of HV1 are derived from the DRB3-negative DRB1*0803 haplotype.