Figure 1: A. An example of peptidyl-tRNA. The peptide (red) is attached through an ester bond to the 3’ end of tRNA (black), in this case tRNAPro. B. Close up of the ester bond between ribose 3’-hydroxyl group and C-terminus of the peptide chain. Note that the ester bond can also be formed between ribose 2’-hydroxyl group.
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