Proteins

• Protein denaturation during cooking

  1. Heating breaks intermolecular bonds

  2. Protein structure altered

  3. Food texture altered
• Protein


  • Made up of amino acids
  • Involved in maintenance and regulation of life processes
• Protein structure


  • Globular - spiral chains folded into compact units
  • fibrous - long and thin
• Hydrolysis of proteins


  Breaks down into amino acids
• Proteins and amino acids are obtained through diet
• Animals cannot make essential amino acids themselves
• Protein synthesis


  Amino acids joined together by condensation reactions to form proteins
• Protein folding


  Proteins fold into compact units
• Fibrous proteins


  • Major structural materials of animal tissue
• Enzymes


  • Biological catalysts
  • Have amino and carboxylic groups
  • Site where substrate binds
• Amino acids


  • Glycine
  • Alanine
• Oxidation reactions involve O2