ale t B f Me

these two subunits form the 70S ribosome. The main catalytic function of the ribosome is performed by rRNAs, not by proteins; hence the ribosome is actually a ribozyme (Ban et al., 2000). The 30S subunit binds mRNA and the anticodon end of the tRNAs and is tempts are underway to develop a more detailed un-derstanding of the translocation steps in the ribosome. Cryo-electron microscopy (cryo-EM) of the ribosome has provided an initial understanding of the steps in-volved during protein synthesis (Agrawal et al., 1999