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  • Title: A highly polymorphic locus very tightly linked to the Huntington's disease gene.
    Author: Wasmuth JJ, Hewitt J, Smith B, Allard D, Haines JL, Skarecky D, Partlow E, Hayden MR.
    Journal: Nature; 1988 Apr 21; 332(6166):734-6. PubMed ID: 2895895.
    Abstract:
    The genetic defect in Huntington's disease (HD), an inherited neuropsychiatric disorder of unknown etiology, has not been defined. The discovery of linkage between HD and the DNA marker D4S10(G8) raised the possibility of isolating the disease gene on the basis of its chromosomal location, in addition to providing a limited presymptomatic test for the late onset disorder. But it has been difficult to isolate other DNA markers nearer to the HD gene, and this has hampered attempts to identify the disease locus and limited the applicability and accuracy of predictive testing. Recently, several new DNA markers from the region of the genome near the HD gene have been isolated using a directed cloning strategy. We describe here the characterization of one of these new markers, D4S95, a highly polymorphic locus which displays no recombination with the HD gene in the families tested. The high degree of polymorphism at this locus and its proximity to the HD gene make it extremely useful for predictive testing and as a new starting point for attempts to clone the disease gene.
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