During the elongation phase of translation, a charged tRNA enters the A site of the ribosome. What is the immediate next step catalyzed by the ribosome?

Core Concept

Peptidyl transferase, an enzymatic component of the large ribosomal subunit (composed of rRNA), catalyzes the formation of a peptide bond. This transfers the growing polypeptide from the tRNA in the P site to the amino acid attached to the tRNA in the A site.