Source:http://linkedlifedata.com/resource/umls/id/C0376452
MSH: Addition of methyl groups to DNA. DNA methyltransferases (DNA methylases) perform this reaction using S-ADENOSYLMETHIONINE as the methyl group donor.,GO: The covalent transfer of a methyl group to either N-6 of adenine or C-5 or N-4 of cytosine. [GOC:ems, ISBN:0198506732],CSP: addition of methyl groups to DNA; DNA methyltransferases (DNA methylases) perform this reaction using s-asenosylmethionine as the methyl group donor.,NCI: The process by which methyl groups are added to nucleotides in genomic DNA.