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flag Scientists find that excessive repeats of a DNA sequence cause brain cell death in Huntington's disease.

flag Scientists have uncovered a key detail about Huntington's disease, a fatal neurological disorder. flag They found that when a specific DNA sequence, CAG, repeats 40 or more times in the gene responsible for the disease, these repeats expand over time. flag Once the repeats reach about 150, certain brain cells begin to die, leading to the onset of Huntington's. flag This discovery could lead to new methods to delay or prevent the disease, which affects around 41,000 Americans and currently has no cure.

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