Nucleic Acids Research, 1984, Vol. 12, No. 14 5869-5877
© 1984
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Increased G+C content of DNA stabilises methyl CpG dinucieotides
Department of Biochemistiy, University of Glasgow Glasgow G12 8QQ, UK
Received April 26, 1984. Revised June 13, 1984. Accepted June 26, 1984.
The vertebrate genome is a mosaic of regions differing dramatically in their G+C content. Those regions with a high G+C Content contain the expected number of CpG dinucleotides and we propose that following rnethylation these have been protected from deamination by the increased stability of the surrounding DNA duplex. This argument applies both to the microenvironment of the CpG dinucleotide and to whole gene regions.
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