title: Is there a physical chemical basis for the present genetic code?
mesh_terms: D000596:Amino Acids; D055598:Chemical Phenomena; D002621:Chemistry; D002627:Chemistry, Physical; D005815:Genetic Code; D009682:Magnetic Resonance Spectroscopy; D009690:Nucleic Acid Conformation; D011119:Polynucleotides; D012265:Ribonucleotides
chemical_list: D000596:Amino Acids; D011119:Polynucleotides; D012265:Ribonucleotides