Coupled amino acid vestiges of the primordial genetic code.
D000596:Amino Acids / Q000235:genetics* / Q000378:metabolism; D000818:Animals; D001692:Biological Transport; D003062:Codon; D005815:Genetic Code; D007536:Isomerism; D051379:Mice; D010179:Pancreas / Q000378:metabolism; D012333:RNA, Messenger
D000596:Amino Acids; D003062:Codon; D012333:RNA, Messenger