Abstract
Amino acids and nucleotides coexisted before cells. Amino acids and nucleotides were formed readily from small organic molecules (2–4ab). Hypercyclic networks of polypeptides (L-enantiomers dominating), and nucleic acids (RNA, catalyzing ribozymes, and ribonucleoproteins (RNP) coexisted in the ancient Earth some four milliard (billion) years ago in a pre-cellular era [5–10]
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Sinkovics, J.G. (2016). The Primordial Genes Are Conserved as Stem Cell Genes and Proto-Oncogenes. In: RNA/DNA and Cancer. Springer, Cham. https://doi.org/10.1007/978-3-319-22279-0_2
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DOI: https://doi.org/10.1007/978-3-319-22279-0_2
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