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. 1983 Apr;80(7):1972–1976. doi: 10.1073/pnas.80.7.1972

Sequences related to HLA-DR alpha chain on human chromosome 6: restriction enzyme polymorphism detected with DC alpha chain probes.

J Trowsdale, J Lee, J Carey, F Grosveld, J Bodmer, W Bodmer
PMCID: PMC393734  PMID: 6300884

Abstract

Three sets of cosmid clones--containing the HLA-DR alpha chain gene and two additional related genes--were isolated from human genomic DNA libraries by using a cDNA probe for the HLA-DR alpha chain. Southern blot analysis using DNA from somatic cell hybrids indicated that all of the clones mapped to chromosome 6. Partial sequence analysis showed that the two additional related genes were highly homologous to each other, and to the HLA-DR alpha chain, in parts of the exon that encoded the alpha 2 domain but were more divergent in intron sequences. One of the genes corresponds to the HLA-DR-related DC series. DNA probes made from this gene revealed marked restriction enzyme polymorphism when hybridized to genomic DNA from HLA-DR typed homozygous cell lines. The patterns obtained from a number of homozygous and heterozygous cell lines correlated with the HLA-DR crossreactive serotypes and also indicated that there is a further sequence in the haploid human genome that is closely homologous with the DC alpha chain sequence. One family was studied and showed the expected HLA-DR-associated inheritance of restriction enzyme patterns. No polymorphism has yet been demonstrated in restriction enzyme fragments that include the other cloned sequence, which may correspond to the SB alpha chain gene or to a novel HLA-DR-related gene. These experiments indicate that there are at least three sequences in the human genome related, but not identical, to the HLA-DR alpha chain gene.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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