title: On the origin of the genetic code.
mesh_terms: D000596:Amino Acids; D003062:Codon / Q000235:genetics; D005815:Genetic Code; D008957:Models, Genetic; D014176:Protein Biosynthesis; D012343:RNA, Transfer / Q000235:genetics
chemical_list: D000596:Amino Acids; D003062:Codon; D012343:RNA, Transfer