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Genomics. 1990 Sep;8(1):106-12.

Physical mapping distal to the DMD locus.

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  • 1Institute of Molecular Medicine, John Radcliffe Hospital, Headington, Oxford, England.


We report a new locus, designated JC-1, which maps between the gene responsible for adrenal hypoplasia (AHC) and the gene that encodes glycerol kinase (GK) in Xp21.2-21.3. The probe identifying this locus was obtained by cloning the distal sequence of a junction fragment from a Duchenne muscular dystrophy (DMD) patient with a large deletion. Pulsed-field gel electrophoresis analysis shows that a region of at least 4 Mb separates the 3' end of the dystrophin gene and the closest distal marker to AHC, DXS28. This region of the human genome contains few genes whose deletion results in a clinical phenotype. JC-1 is a useful probe from which to initiate strategies directed at cloning the AHC and GK loci.

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