Five of the six novel HLA-B alleles described in this report contain polymorphic motifs previously reported in HLA-B alleles, suggesting an origin resultant from a gene conversion mechanism. The sixth allele, B*35012, contains a polymorphism previously unreported in HLA-B molecules. In addition to previously reported polymorphisms, B*5806 carries a previously unreported intronic substitution in a sequencing primer annealing site.
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