188.8.131.52 Proteins (A-level only)
Proteins are sequences of amino acids joined by peptide links.
The importance of hydrogen bonding and sulfur–sulfur bonds in proteins.
The primary, secondary (α-helix and β–pleated sheets) and tertiary structure of proteins.
Hydrolysis of the peptide link produces the constituent amino acids.
Students should be able to:
• draw the structure of a peptide formed from up to three amino acids
• draw the structure of the amino acids formed by hydrolysis of a peptide
• identify primary, secondary and tertiary structures in diagrams
• explain how these structures are maintained by hydrogen bonding and S–S bonds