BY1.1 - Proteins

Proteins

• Always contain cabon, hydrogen, oxygen and nitrogen
• Sometimes contain sulfur and phosphorus
• Examples are:
  • Enzymes
  • Amino acids
  • Hormones
  • Carriers
  • Transport Proteins
• Formed by amino acids

All have the same basic structure:

The Peptide Bond:

• The amine group of one amino acid reacts with the carboxyl group of another
• Removes water and forms a peptide bond and a dipeptide
• Polypeptide: many amino acids joined together 

Protein Structure:

• Primary Structure:
  • The sequence of amino acids in a polypeptide chain 

• Secondary Structure:
  • The shape of the peptide chains…