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  • Title: A YAC contig spanning the hypophosphatemic rickets disease gene (HYP) candidate region.
    Author: Francis F, Rowe PS, Econs MJ, See CG, Benham F, O'Riordan JL, Drezner MK, Hamvas RM, Lehrach H.
    Journal: Genomics; 1994 May 01; 21(1):229-37. PubMed ID: 8088792.
    Abstract:
    Dominant X-linked hypophosphatemic rickets (HYP) is the most common form of familial rickets. Linkage studies have localized the gene for this disorder to Xp22.1 between the markers DXS365 and DXS274, a region estimated to be approximately 3.5 cM. We have constructed a 1.5-Mb YAC contig encompassing this region by hybridization screening of high-density YAC clone filters. Rapid chromosome walking was achieved by direct hybridization of a pool of Alu-PCR products derived from a YAC containing DXS365 to the filter grids. Overlaps between YACs in the contig were estimated by hybridization of end probes to YAC digest blots and by analysis of cosmid fingerprints obtained by hybridization of YAC inserts to a flow-sorted chromosome X cosmid library. All YACs in the contig have been verified by fluorescence in situ hybridization. Several YACs spanning the HYP gene candidate region were selected for further analysis by rare-cutter enzyme digestion and pulsed-field gel electrophoresis. We estimate that the markers flanking the disease region, DXS365 and DXS274, are less than 1 Mb apart. This clone contig map provides an essential resource for the isolation of the HYP gene.
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