Figure 11From: On the origin of the translation system and the genetic code in the RNA world by means of natural selection, exaptation, and subfunctionalizationOrigin of the translation system and the genetic code in the RNA World. Step 7: The proto-large subunit, R L , evolves the capacity to bind aminoacyl-T RNAs, resulting in more precise amino acid positioning on R L . The activity of R L switches from amino acid ligation to transpeptidation, resulting in an increased peptide yield.Back to article page