Elongation of polypeptide
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✏ Elongation
▶️ A second tRNA charged with an amino acid enters the A–site, this is with the help of elongation factors.
▶️ It pairs with second codon.
▶️ Mostly found in case of polypeptides.
▶️ Then the peptide bond is formed between the first and second amino acid.
▶️ This bond formation is catalysed by the enzyme peptidyl transferase.
▶️ During this linkage between the first amino acid and its tRNA is broken.
▶️ This tRNA is unloaded from P–site and the second at the A–site is pulled to the P–Site along with mRNA then this process is known as translocation.
▶️ This results in the third codon shift to the A–site now a tRNA charged with third amino acid binds at the A-site for chain elongation in the 5’3’ direction.
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