Published in Gene Therapy Weekly, February 12th, 2009
"In humans, a nearly identical copy gene is present called SMN2, but this gene cannot compensate for the loss of SMN1 because of a single silent nucleotide difference in SMN2 exon 7. This single-nucleotide difference attenuates an exonic splice enhancer, resulting in the production of an alternatively spliced isoform lacking exon 7, which is essential for protein function. SMN2, however, is a critical disease...
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