Proteins

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  • Created by: Leenaa
  • Created on: 29-05-15 13:46
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  • Proteins
    • Dipeptide = Two amino acids join together
      • Polypeptide = More than two amino acids join together
        • Deamination = Excess amino acids are converted into urea in the liver and removed
    • Join together by PEPTIDE bonds
      • Through condensation reactions
    • Primary, secondary, tertiary and quatenary
    • Haemoglobin
      • Globular
      • Haem containing prosthetic Fe group
      • 2 alpha and 2 beta subunits
      • Soluble in water as hydrophilic chains on outside
      • 4 polypeptides
        • 1 haem per polypeptide
    • Collagen
      • Fibrous
      • Insoluble in water
      • Supportive tissue for animals
      • Structure
        • Peptide bonds between amino acids
        • Triple helix
        • 3 polypeptide chains
        • Crosslinks
        • Fibril
        • Glycine

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