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Among the large number of human leucocyte antigen (HLA) alleles, only a few have been identified with a nucleotide polymorphism impairing correct splicing. Those alleles show aberrant expression levels, due to either a direct effect of the polymorphism on the normal splice site or to the creation of an alternative splice site. Furthermore, in several studies, the presence of alternatively spliced...
Currently 1582 HLA‐DRB1 alleles have been identified in the IMGT/HLA database (v3.18). Among those alleles, more than 90% have incomplete allele sequences, which complicates the analysis of the functional relevance of polymorphism beyond exon 2. The polymorphic index of each individual exon of the currently known allele sequences, shows that polymorphism is present in all exons, albeit not equally...
The functional relevance of human leukocyte antigen (HLA) class I allele polymorphism beyond exons 2 and 3 is difficult to address because more than 70% of the HLA class I alleles are defined by exons 2 and 3 sequences only. For routine application on clinical samples we improved and validated the HLA sequence‐based typing (SBT) approach based on RNA templates, using either a single locus‐specific...
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