title: Directed evolution: overcoming biology's limitations.
authors.forename: Daniel H
authors.initials: DH
authors.lastname: Appella
mesh_terms: D019020:Directed Molecular Evolution; D005821:Genetic Techniques; D021141:Nucleic Acid Amplification Techniques / Q000379:methods*; D020135:Peptide Nucleic Acids / Q000737:chemistry* / Q000235:genetics
chemical_list: D020135:Peptide Nucleic Acids