[How did protoproteins originate?].
D000596:Amino Acids / Q000096:biosynthesis; D000818:Animals; D005075:Biological Evolution; D009842:Oligopeptides / Q000096:biosynthesis; D014176:Protein Biosynthesis; D013768:Tetrahymena
D000596:Amino Acids; D009842:Oligopeptides