Respuesta :

Answer:

  • Haemoglobin consists of four polypeptides while collagen has three.
  • Haemoglobin is globular and has a tertiary structure while collagen is fibrous and lacks a tertiary structure.
  • Haemoglobin is conjugated (contains heme groups - example of a prosthetic group) whereas collagen is not conjugated.
  • Haemoglobin has a functional role (carries oxygen) while collagen has a structural role.

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Haemoglobin's quaternary structure is four polypeptide subunits (2 alpha and 2 beta chains) whereas Collagen's structure is 3 polypeptide chains wound around each other like rope. Haemoglobin has a prosthetic group – each chain contains a haem group (Fe2+) but collagen has no prosthetic group.

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