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Mapping of DNA Instability at the Fragile X to a Trinucleotide Repeat Sequence P(CCG) n

Kremer, E. J., Pritchard, M., Lynch, M., Yu, S., Holman, K., Baker, E., Warren, S. T., Schlessinger, D., Sutherland, G. R., Richards, R. I.·1991·Science

Abstract

The sequence of a Pst I restriction fragment was determined that demonstrate instability in fragile X syndrome pedigrees. The region of instability was localized to a trinucleotide repeat p(CCG) n . The sequences flanking this repeat were identical in normal and affected individuals. The breakpoints in two somatic cell hybrids constructed to break at the fragile site also mapped to this repeat sequence. The repeat exhibits instability both when cloned in a nonhomologous host and after amplification by the polymerase chain reaction. These results suggest variation in the trinucleotide repeat copy number as the molecular basis for the instability and possibly the fragile site. This would account for the observed properties of this region in vivo and in vitro.

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Metadata

Authors
Kremer, E. J., Pritchard, M., Lynch, M., Yu, S., Holman, K., Baker, E., Warren, S. T., Schlessinger, D., Sutherland, G. R., & Richards, R. I.
Venue
Science
Published
1991-06-21
Volume
252
Issue
5013
Pages
1711-1714
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W1989187665
Cited by
908
References
0
FWCI
50.24
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Mapping of DNA Instability at the Fragile X to a Trinucleotide Repeat Sequence P(CCG) n. https://app.cochat.ai/papers/10.1126/science.1675488
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Kremer, E. J., Pritchard, M., Lynch, M., Yu, S., Holman, K., Baker, E., Warren, S. T., Schlessinger, D., Sutherland, G. R., & Richards, R. I. (1991). Mapping of DNA Instability at the Fragile X to a Trinucleotide Repeat Sequence P(CCG) n. Science. https://doi.org/10.1126/science.1675488

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