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  • Title: Fish mapping of 250 cosmid and 26 YAC clones to chromosome 4 with special emphasis on the FSHD region at 4q35.
    Author: Wijmenga C, Dauwerse HG, Padberg GW, Meyer N, Murray JC, Mills K, van Ommen GB, Hofker MH, Frants RR.
    Journal: Muscle Nerve Suppl; 1995; 2():S14-8. PubMed ID: 7739620.
    Abstract:
    Facioscapulohumeral muscular dystrophy (FSHD) is located on chromosome 4q35, close to the telomere. FSHD patients carry deletions within a cluster of tandemly repeated DNA. Although expression of a functional FSHD gene will be altered in patients, the sequence itself may be unaffected by this deletion. Hence, the FSHD gene could lie outside of the deleted region. This study employs fluorescent in situ hybridization using chromosome 4-specific cosmid and YAC clones to rapidly saturate chromosome 4 with new markers. Some 250 cosmids and 26 YACs were regionally mapped, of which 5 YACs and 55 cosmids mapped to the distal portion of 4q. Only one of these clones (D4S1454) mapped telomerically to a translocation breakpoint specified by D4S187. Using two-color interphase mapping, the following marker order was obtained: Cen-D4S187-D4S1454-HSPCAL2-D4S163-D4S139-+ ++D4F35S1. Absence of additional markers mapping distal to D4F35S1 indicates that the linkage group containing the FSHD gene lies extremely close to the 4q telomere.
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