title: Modification of the rare nucleoside X in Escherichia coli tRNAs with antigenic determining, photolabile, and paramagnetic residues.
mesh_terms: D000613:Aminobutyrates; D004578:Electron Spin Resonance Spectroscopy; D000939:Epitopes; D004926:Escherichia coli / Q000032:analysis*; D010782:Photolysis; D012343:RNA, Transfer; D012260:Ribonucleases; D014529:Uridine / Q000031:analogs & derivatives*
chemical_list: D000613:Aminobutyrates; D000939:Epitopes; D012343:RNA, Transfer; D012260:Ribonucleases; D014529:Uridine