Figure 12From: 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 8: An accessory RNA subunit, R S (progenitor of the small ribosomal subunit), capable of binding aminoacyl-T RNAs through interaction between complementary base triplets.Back to article page