Abstract:
:Human Ia(-like) specificities controlled by gene loci other than HLA-DR were searched for at the molecular level in cells of human B-cell-type cell lines which carry two established DR specificities. Chevalier cells of DRw3 and 7 and U698M cells of DRw2 and 4 were used. Their Ia molecules were partially purified, radioiodinated and analyzed for Ia specificities by the direct binding and sequential binding assays with a selected panel of human Ia alloantisera. It was possible in both the cell lines to define a third subset of Ia molecules carrying a new specificity in addition to two Ia subsets carrying the established DR specificities. The new specificity was detected by putative anti-DRw4 and anti-DRw7 antisera and was closely associated with DRw4 and DRw7 at population level. It was thus designated provisionally as BR4X7. These results suggest that the BR4X7 specificity is coded for by a separate Ia locus closely linked to HLA-DR locus. The determinant(s) responsible for BR4X7 was located on the small subunit of Ia molecules.
journal_name
Immunogeneticsjournal_title
Immunogeneticsauthors
Tanigaki N,Tosi R,Pressman D,Ferrara GBdoi
10.1007/BF01561564subject
Has Abstractpub_date
1980-01-01 00:00:00pages
151-67issue
2eissn
0093-7711issn
1432-1211journal_volume
10pub_type
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