Write a note on tertiary structure of proteins.

Explanation

The secondary structure elements (`alpha`-helix & `beta`-sheets) further folds to form the three dimensional arrengment. This structure is called tertiary structure of the polypeptide (protein).
(ii) Tertiary structure of proteins are stabilised by the interactions between the side chains of the amino acids.
(iii) These interactions include the disulphide bridges between cysteine residues, electrostatic, hydrophobic, hydrogen bonds and van der Waals interactions.