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All wild-type sequences are derived from the Exon-Intron Database (ref.), which is, in turn, based on GenBank build 35.1 of the human genome.
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The only wild-type sequences that differ from this source are those for the "SMN1" gene, exon #8. In the version of the genome upon which the EID was built, there was not yet a separate entry for "SMN2" in which the sixth nucleotide of that exon is 'T' instead of 'C'. Instead, the EID contains the sequence for "SMN2", in which the start of exon #8 is 'GGTTTT', under the name "SMN1". Thus, all entries for this gene pair are linked with a single gene entry named "SMN1", but entries 79-81asmd actually pertain to what is now recognized as "SMN1", and their wild-type and mutant sequences reflect that. In addition, mutation '1asmd' refers to the natural SMN1 to SMN2 mutation itself. A future release based on a more recent build of the human genome will resolve this issue.
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