Hugo Z.J. Jorens

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Fragile X syndrome is characterized at the molecular level by amplification of a (CGG)n repeat and hypermethylation of a CpG island preceeding the open reading frame of the fragile X gene (FMR–1) located in Xq27.3. Anticipation in this syndrome is associated with progressive amplification of the (CGG)n repeat from a premutation to a full mutation through(More)
Large expansions of the CGG repeat in the 5' untranslated region of the FMR1 gene are found in patients with the fragile X syndrome. Amplified CGG repeats in FMR1 are unstable and show intergenerational increase from mother to offspring. The exact timing of repeat amplification, however, is unknown. We have compared the extent of CGG expansion in various(More)
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