Answer :
Chains of amino acids in messenger RNA / mRNA terminated with N-terminal and C-terminal. The free carboxyl group is called C-terminal, while the free amino group is called N-terminal.
Carboxyl group amino acids are not part of a peptide bond. The carboxyl group is part of a carboxylic acid, carboxylate, or rarely a carboxylic acid derivative such as an ester. C-terminal in a protein is the protein signal needed to retain signs.
Amino acids residue in N-terminal is not part of a peptide bond and usually, although that is not in every polypeptide or protein, it’s an amine or ammonium cation. N-terminal is for targeting signals.
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