A physical map of 4 million bp around the Duchenne muscular dystrophy gene on the human X-chromosome.
Employing pulsed field gradient electrophoresis, we constructed a 4.5 million bp (Mb) Sfil restriction map of the human X-chromosomal region p21, harboring genes for Duchenne (DMD) and Becker Muscular Dystrophy. In a DMD patient with additional chronic granulomatosis and retinitis pigmentosa, the proximal 3.5 Mb is deleted. Another DMD patient, with additional glycerol kinase deficiency and adrenal hypoplasia, lacks at least 3.3 Mb in the middle region, including marker C7 but not B24, placin...Expand abstract
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