title: In vitro DNA methylation by methylnitrosourea in isolated copper- or silver-preloaded rat liver nuclei.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000378:metabolism*; D003300:Copper / Q000494:pharmacology*; D004247:DNA / Q000378:metabolism*; D006147:Guanine / Q000031:analogs & derivatives / Q000378:metabolism; D066298:In Vitro Techniques; D008099:Liver / Q000378:metabolism*; D008297:Male; D008745:Methylation; D008770:Methylnitrosourea / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains; D012834:Silver / Q000494:pharmacology*
chemical_list: D012834:Silver; D006147:Guanine; D008770:Methylnitrosourea; D003300:Copper; D004247:DNA; C008449:O-(6)-methylguanine