The secondary structure sections of a polypeptide may further be organized into a tertiary structure
by these interactions:
This diagram shows tertiary structure of myoglobin, an oxygen carrier molecule in muscle cells.
- Covalent disulfide bonds form between polar
- Most of the polar hydrophilic R groups are located on the surface, close to surrounding water molecules.
- Most nonpolar hydrophobic R groups are located on the interior, avoiding water.