Answer:
Protein's primary structure
Step-by-step explanation:
The proteins have four different types of structures:
Primary: Describes the sequence of amino acids that is unique for each protein
Secondary: Makes reference to the proteins 3D geometry, it can be alpha-helix (product of the protein coiling) or beta-plated sheet (product of the protein folding).
Tertiary: Refers to the comprehensive 3D structure of the protein. There are many types of tertiary structures, due to hyfrophobic interactions, hydrogen unions, ionic unions.
Quaternary: Resambles the macromolecule formed by many protein molecules. Not all proteins have quaternary structure.