Literature DB >> 1620618

The distribution of 5-methylcytosine in the nuclear genome of plants.

L M Montero1, J Filipski, P Gil, J Capel, J M Martínez-Zapater, J Salinas.   

Abstract

We have determined the 5-methylcytosine (5mC) content in high molecular weight DNA, from two dicot (tobacco and pea) and two monocot (wheat and maize) plant species, fractionated according to base composition. The results show that the proportion of 5mC in the genomic fractions increases linearly with their guanine + cytosine (G + C) content while the proportion of non-methylated cytosine remains almost constant. This can be interpreted as a consequence of a difference in mutation pressure related to spontaneous deamination of 5mC to thymine between the different compartments of plant genomes.

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Year:  1992        PMID： 1620618      PMCID： PMC312460          DOI： 10.1093/nar/20.12.3207

Source DB:  PubMed          Journal:  Nucleic Acids Res        ISSN： 0305-1048            Impact factor:   16.971


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