The distribution of 5-methylcytosine in the nuclear genome of plants
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. © 1992 IRL Press at Oxford University Press.
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| Main Authors: | , , , , , |
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| Format: | journal article biblioteca |
| Language: | English |
| Published: |
Oxford University Press
1992
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| Online Access: | http://hdl.handle.net/20.500.12792/5303 http://hdl.handle.net/10261/294961 |
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| Summary: | 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. © 1992 IRL Press at Oxford University Press. |
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