Length-dependent structure formation in Friedreich ataxia (GAA)n{middle dot}(TTC)n repeats at neutral pH

Abstract excerpt

More than 15 human genetic diseases have been associated with the expansion of trinucleotide DNA repeats, which may involve the formation of non-duplex DNA structures. The slipped-strand nucleation of duplex DNA within GC-rich trinucleotide repeats may result in the changes of repeat length; however, such a mechanism seems less likely for the AT-rich (GAA)n*(TTC)n repeats. Using two-dimensional agarose gels,...

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