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X inactivation, differentiation, and DNA methylation

Riggs, A.D.·1975·Cytogenetic and Genome Research

Abstract

A model based on DNA methylation is proposed to explain the initiation and maintenance of mammalian X inactivation and certain aspects of other permanent events in eukaryotic cell differentiation. A key feature of the model is the proposal of sequence-specific DNA methylases that methylate unmethylated sites with great difficulty but easily methylate half-methylated sites. Although such enzymes have not yet been detected in eukaryotes, they are known in bacteria. An argument is presented, based on recent data on DNA-binding proteins, that DNA methylation should affect the binding of regulatory proteins. In support of the model, short reviews are included covering both mammalian X inactivation and bacterial restriction and modification enzymes.

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Metadata

Authors
Riggs, A. D.
Venue
Cytogenetic and Genome Research
Publisher
S. Karger AG
Published
1975
Volume
14
Issue
1
Pages
9-25
ISSN
  • 0301-0171 (ISSN-L)
  • 1424-8581
  • 1424-859X
OpenAlex
W2051406511
Cited by
1,342
References
0
FWCI
19.36
Type
journal article
Language
en
Open access
closed
Licence

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