• A protein is an organic compound made up of small molecules called amino acids.
  • There are 20 different amino acids commonly found in the proteins of living organisms.
  • A protein may have up to four levels of structure.
  • The order of amino acids, together with the properties of the amino acid, determines the shape of the protein.
  • The structure of a protein starts with its sequence of amino acid.
  • The complex structures of different proteins give them unique properties.
  • Proteins play many important roles in living things.
Select from the frequently asked questions below