Abstract

Using a mouse genomic fragment containing the brain-specific promoter region of the dystrophin gene, we have located the brain promoter 75–300 kb proximal of the muscle promoter. Within our DMD-families we detected a patient who lacks both the brain-specific and muscle-specific promoter sequences. The normal intellectual capabilities of the patient argue against an indispensable role of the brain-specific first exon in mental functioning. The possibility exists that a NH 2-terminally truncated dystrophin has taken over the function of the normal dystrophins in brain and/or muscle.

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