Haemoglobin vs Collagen

A comparison of the structure and function between haemoglobin and collagen.

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  • Created by: J
  • Created on: 19-05-12 14:37
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Haemoglobin Collagen
Globular protein Fibrous protein
Soluble in water Insoluble in water
Large number of different amino acids 35% of primary structure is glycine (a
in primary structure type of amino acid)
Has a prosthetic group ­ haem Has no prosthetic group
Molecule wound into alpha helix Molecule consists of lefthanded helix
structure structures
Four polypeptide chains Three polypeptide chains
Transport protein Structural protein
Use: transports oxygen (bound to the Use: walls of arteries, tendons, bones,
Fe2+ in haem group) to active tissues cartilage and connective tissue,
cosmetic treatments.


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