There are four stages of protein folding; primary, secondary, tertiary and quaternary.
- The primary structure is the sequence of amino acids held together by peptide bonds. In this process, amino acids begin to form a long, linear chain of protein.
- The secondary structure is the protein beginning to fold up. It can have two types of structure:
- the alpha helix, a coil shape held by hydrogen bonds in the same direction as the coil.
- The beta pleated sheet is an S shape pattern, also with hydrogen bonds holding the structure together.