title: Selection in vitro.
mesh_terms: D001435:Bacteriophages / Q000201:enzymology*; D005075:Biological Evolution; D012321:DNA-Directed RNA Polymerases; D004996:Ethidium / Q000494:pharmacology*; D066298:In Vitro Techniques; D009154:Mutation; D012313:RNA / Q000235:genetics*; D012641:Selection, Genetic
chemical_list: D012313:RNA; D012321:DNA-Directed RNA Polymerases; D004996:Ethidium