DNA sequence polymorphism at the human tumor necrosis factor (TNF) locus. Numerous TNF/lymphotoxin alleles tagged by two closely linked microsatellites in the upstream region of the lymphotoxin (TNF-beta) gene.

Abstract excerpt

TNF-alpha and lymphotoxin (LT, TNF-beta) genes are tandemly arranged and map within the MHC centromeric to HLA-B and telomeric to the class III genes. Both cytokines encoded by these genes are potent immunomodulators. On the other hand, some MHC-linked autoimmune diseases are characterized by abnormal levels of their expression or inducibility. A search for the putative disease-associated TNF/LT alleles depends...

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