title: Creation and evolution of new ribozymes.
authors.affiliation: Whitehead Institute for Biomedical Research and Department of Biology, MIT, Cambridge, Massachusetts 02142, USA.
authors.forename: D P
authors.initials: DP
authors.lastname: Bartel
mesh_terms: D019020:Directed Molecular Evolution; D016337:RNA, Catalytic / Q000138:chemical synthesis
chemical_list: D016337:RNA, Catalytic