title: On the possibility of a stage in the evolution of the genetic message in which replication was imprecise.
mesh_terms: D005075:Biological Evolution; D004261:DNA Replication; D004926:Escherichia coli; D005804:Genes, Lethal; D005815:Genetic Code; D008967:Molecular Biology; D009711:Nucleotides; D010452:Peptide Biosynthesis; D011119:Polynucleotides; D011687:Purines; D012313:RNA / Q000096:biosynthesis
chemical_list: D009711:Nucleotides; D011119:Polynucleotides; D011687:Purines; D012313:RNA