Indications of an evolutionary pathway in the amino acid code.
D000225:Adenine; D000596:Amino Acids / Q000378:metabolism*; D005075:Biological Evolution; D003013:Clostridium; D003596:Cytosine; D005288:Ferredoxins / Q000032:analysis; D005815:Genetic Code; D006147:Guanine; D008967:Molecular Biology; D014176:Protein Biosynthesis; D012343:RNA, Transfer / Q000378:metabolism; D014498:Uracil
D000596:Amino Acids; D005288:Ferredoxins; D014498:Uracil; D006147:Guanine; D003596:Cytosine; D012343:RNA, Transfer; D000225:Adenine