title: Parallel worlds.
authors.forename: D E
authors.initials: DE
authors.lastname: Draper
mesh_terms: D000818:Animals; D007438:Introns; D008958:Models, Molecular; D009690:Nucleic Acid Conformation; D016337:RNA, Catalytic / Q000378:metabolism*; D012343:RNA, Transfer / Q000378:metabolism; D013768:Tetrahymena / Q000201:enzymology*
chemical_list: D016337:RNA, Catalytic; D012343:RNA, Transfer