Figure 8From: 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 4: the original activity of the ribozyme R (X-Y) and the peptide ligase activity are apportioned between two ribozymes as the result of duplication and subfunctionalization; the ancestor of the large ribosomal subunit (R L ) emerges.Back to article page