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“Proteogenesis” (the origin of proteins) is a likely key event in the unsolved problem of biogenesis (the origin of life). The raw material for the very first proteins comprised the available amino acids produced and accumulated upon the early earth via abiotic chemical and physical processes. A broad consensus is emerging that this pre-biotic set likely comprised Ala, Asp, Glu, Gly, Ile, Leu, Pro,...
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