Definition of Peptide

The peptide is a polymer that is formed by the linking of amino acids. The peptide is a short-chain consisting of a minimum of two and a maximum of fifty amino acid residues present in it. The amino acids are bonded to each other with the help of a linkage known as a peptide bond. The carbonyl group of one amino acid molecule reacts with the amino group of the other molecule and form a peptide linkage and release a molecule of water alongside.


At one end of the peptide is present a C-terminal whereas, on the other end, N-terminal is present. Both of them allow other amino acids to come and increase the length of the chain. A polypeptide is formed when the number of amino acids is more than fifty and it is a long, continuous, and unbranched chain that further forms a protein molecule.

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