title: The origin of the genetic code.
mesh_terms: D000596:Amino Acids; D001665:Binding Sites; D005075:Biological Evolution; D055598:Chemical Phenomena; D002621:Chemistry; D005815:Genetic Code; D010452:Peptide Biosynthesis; D012333:RNA, Messenger; D012343:RNA, Transfer
chemical_list: D000596:Amino Acids; D012333:RNA, Messenger; D012343:RNA, Transfer