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  • Haemoglobin
    • A protein
    • Carries oxygen around the body
    • DIfferent species have different 'versions'
    • Found in red blood cells
    • (Hb)
    • Has a quarternary structure
    • Made up of 4 polypeptide chains
    • Each chain has a haem group
      • This contains iron and gives haemoglobin its red colour
    • Has high affinity for oxygen - wants to carry it
      • Can carry 4 oxygen molecules
    • In the lungs, oxygen joins to haemoglobin
      • This forms oxyhaemoglobin
        • Reversible reaction
          • oxygen dissociates from it
    • Hb + 4O(2)  <=> HbO(8)


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