Abstract
As part of our effort to clone positionally the oculopharyngeal muscular dystrophy (OPMD) gene, we constructed a YAC contig, a cosmid contig, and anEcoRI restriction map of the OPMD candidate region. The YAC contig spans more than 2 Mb and encompasses the loci D14S283 and D14S990 and the cardiac α and β myosin heavy chain genes (MYH6 and MYH7). A 700-kb cosmid contig containing the D14S990 and the myosin genes and a long-range restriction map covering the region between D14S990 and the MYH6 and MYH7 gene cluster were established. A detailedEcoRI restriction map of the cosmid contig was determined, and five putative CpG islands were identified. Based on these data, the four loci were mapped within an approximately 600-kb region with the following centromere to telomere order: D14S283, D14S990, MYH6, and MYH7. The YAC and cosmid contigs will facilitate the identification of genes lying within the OPMD candidate interval.
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