Large-scale methylation patterns in the nuclear genomes of plants
1992
Matassi, G. | Melis, R. | Kuo, K.C. | Macaya, G. | Gehrke, C.W. | Bernardi, G.
Methylation was investigated in compositional fractions of nuclear DNA preparations (50-100 kb in size) from five plants (onion, maize, rye, pea and tobacco), and was found to increase from GC-poor to GC-rich fractions. This methylation gradient showed different patterns in different plants and appears, therefore, to represent a novel, characteristic genome feature which concerns the noncoding, intergenic sequences that make up the bulk of the plant genomes investigated and mainly consist of repetitive sequences. The structural and functional implications of these results are discussed.
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