Proteins are macromolecules in living systems and serve crucial functions in essentially all biological processes. The proteins are made by polymer: polypeptide and by monomer: amino acids.
Amino acids structures
The amino is made by 2 hydrogen and nitrogen. And the carboxyl is made by a carbon, 2 oxygen and hydrogen. The carbon links together the amino group and the carboxyl group. At the end of the carbon there is hydrogen and the variable.
4 levels of structure are used to describe protein
Primary protein structure: It is a sequence of a chain/order of amino acids. The bonds: peptide bonds
Secondary protein structure: Is a structure that occurs when the sequence of amino acids are linked by hydrogen bonds. The bonds: hydrogen bonds.
Tertiary protein structure: Is a 3D shape of the entire polypeptide. The bonds: hydrogen bonds, ionic bonds.
Quaternary protein structure: Is a protein that contain more then 1 polypeptide.
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