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Genomics. 1991 Jun;10(2):417-24.

New genes in the class II region of the human major histocompatibility complex.

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Human Immunogenetics Laboratory, Imperial Cancer Research Fund, London, United Kingdom.


A detailed map of the class II region of the human major histocompatibility complex has been constructed by pulsed-field gel electrophoresis. This map revealed clusters of sites for enzymes that cut preferentially in unmethylated CpG-rich DNA often found at the 5' ends of genes. Three of these clusters have been cloned by cosmid walking and chromosome jumping. Analysis of the clones encompassing these regions through the use of zoo blots, Northern blots, and cDNA libraries resulted in the discovery of four novel genes. The D6S111E and D6S112E genes are centromeric to the HLA-DPB2 gene, while D6S113E and D6S114E are between HLA-DNA and HLA-DOB. Preliminary characterization of the new genes indicates that they are unrelated to the class II genes themselves, although D6S114E expression, like class II expression, is inducible with interferon. In addition, the HLA-DNA gene has been accurately positioned and oriented for the first time.

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