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From RNA World to RNA-tRNA World to RNA-DNA-tRNA World to DNA-RNA-protein World

Matti Pitkanen


A concrete model for prebiotic evolution as a sequence of 4 worlds: RNA world to RNA-tRNA world to RNA-DNA-tRNA world to DNA-RNA-protein world is proposed. The heff increasing phase transition in which tRNAs originally catalyzing addition of RNA to growing RNA sequences starts to catalyze an addition of amino-adic to growing amino-acid sequence would lead from RNA-DNA-tRNA world to DNA-RNA-protein world.

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