Respuesta :
Proteins are combination of amino acids. When the adjoining amino acid residues are bonded by a linear chain of adjoining carboxyl and amino groups a polypeptide is formed.
Hence for the formation of peptide bond two amino acid groups are required one end is combined with alpha amino group and the other end is combined with alpha carboxyl group
Note: Peptide bonds are linked together by short chain of amino acids
Amino acids are the broken down substances which when digested provide energy to the human body for metabolism
An amino acid residue needs to have the ability to form a covalent bond with both its NH2 group and its COOH group in order to be incorporated into a polypeptide.
- A polypeptide or protein is a polymer composed of a linear sequence of amino acids linked together by peptide bonds.
- An amino acid contains a positively charged amino (NH3) group and a negatively charged carboxyl (COOH) group and an additional group (the side chain) and an additional R group (the side chain).
- The reaction involved in the formation of a peptide bond between two amino acids releases a water molecule (i.e., it is a dehydration synthesis).
- The formation of peptide bonds is catalyzed by enzymes called peptidyl transferases.
In conclusion, an amino acid residue needs to have the ability to form a covalent bond with both its NH2 group and its COOH group in order to be incorporated into a polypeptide.
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