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The normal (unmutated) copy of the C9ORF72 gene doesn't appear to be a genetic modifier of ALS or FTD
Posted on Friday, August 10, 2012 - 03:57, By: Amy Madsen
Humans carry two copies of the C9ORF72 gene, each containing a stretch of DNA in which a sequence of DNA building blocks coded GGGGCC is repeated a number of times. (Each six-letter sequence is called a "repeat.")
When one of the two copies is mutated so that it contains a far greater than normal...