DNA methylation is the covalent bond of a methyl group to the cytosine 5 carbon position of the genomic CpG dinucleotide under the action of DNA methylation transferase. Here, we analyzed the correlation between gene expression and the expression of four methyltransferases (DNMT1: red, DNMT2: blue, DNMT3A: green, and DNMT3B: purple).
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