title: Selective methylation: an incorrect hypothesis.
abstract: "Selective methylation," a hypothesis proposed to explain the discrepancy found in the degree of methyl deficiency of transfer ribonucleic acid, cannot be explained on the basis of some biological phenomenon.
mesh_terms: D002474:Cell-Free System; D004926:Escherichia coli / Q000032:analysis / Q000201:enzymology / Q000378:metabolism*; D006147:Guanine / Q000031:analogs & derivatives / Q000032:analysis; D008715:Methionine / Q000378:metabolism; D008745:Methylation; D009154:Mutation; D009699:N-Glycosyl Hydrolases / Q000378:metabolism; D012329:RNA, Bacterial / Q000032:analysis / Q000378:metabolism*; D012343:RNA, Transfer / Q000032:analysis / Q000378:metabolism*; D012435:S-Adenosylhomocysteine / Q000032:analysis; D014498:Uracil / Q000031:analogs & derivatives / Q000032:analysis; D012359:tRNA Methyltransferases / Q000378:metabolism
chemical_list: D012329:RNA, Bacterial; D014498:Uracil; D006147:Guanine; D012343:RNA, Transfer; D012435:S-Adenosylhomocysteine; D008715:Methionine; D012359:tRNA Methyltransferases; D009699:N-Glycosyl Hydrolases