title: Isolation of a random cosmid clone, cX5, which defines a new polymorphic locus DXS148 near the locus for Duchenne muscular dystrophy.
abstract: We have isolated a random cosmid cX5 (DXS148), which maps into a small Xp21 deletion associated with Duchenne muscular dystrophy (DMD), chronic granulomatous disease (CGD), retinitis pigmentosa (RP) and McLeod syndrome, cX5 maps proximally outside several other deletions associated with DMD, glycerol kinase deficiency (GK) and adrenal hypoplasia (AHC). The following order of loci is proposed: centromere-OTC-cX5 (DXS148)-754 (DXS84)-PERT87 (DXS164)/DMD-telomere. A subclone cX5.7, isolated from this cosmid, identifies an MspI RFLP, with a minor allele frequency of 35%. This probe forms an important adjunct to the existing RFLPs for family studies in Duchenne muscular dystrophy.
mesh_terms: D002872:Chromosome Deletion; D002874:Chromosome Mapping; D003360:Cosmids; D004274:DNA, Recombinant; D005260:Female; D005819:Genetic Markers; D006801:Humans; D008297:Male; D009136:Muscular Dystrophies / Q000175:diagnosis / Q000235:genetics*; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length; D014960:X Chromosome
chemical_list: D004274:DNA, Recombinant; D005819:Genetic Markers