Where are peptide bonds found?

Peptide bonds are found in proteins. Proteins are composed of amino acids, and the peptide bonds hold these together in polypeptide chains.

When two amino acids bond together through a peptide bond, the result is called a dipeptide. When a peptide bond is created between two amino acid molecules, a condensation reaction occurs; this refers to a molecule of water being released during the bonding process. The reverse can also occur; this is known as a hydrolysis reaction and refers to a molecule of water being added to an amino acid bond and splitting the original molecule into two.