Biology Haemoglobin

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  • Created by: Phoebxo
  • Created on: 14-10-15 09:22
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  • Haemoglobin
    • Properties
      • Basic Shape is globular
      • The tertiary structure of the molecule is wound into ? helices
      • Contains a haem prosthetic group
    • Role
      • Carries oxygen in the blood from the respiratory organs to the rest of the body.
        • Oxygen required in the process of cellular respiration
      • Releases the oxygen to permit aerobic respiration to provide energy
      • Plays an important role in maintaining the shape of the red blood cells.
    • Structure
      • Its made up of four protein molecules (globulin chains) that are connected together.
        • Each globulin chain contains an important central structure called the heme molecule
          • Iron embedded in the heme molecule
            • Vital in transporting oxygen and carbon dioxide in our blood.
            • Iron  is responsible for the red color of blood.
      • The normal adult molecule contains two alpha-globulin chains and two beta-globulin chains
      • In fetuses and infants, beta chains are not common and the molecule is made up of two alpha chains and two gamma chains
        • As the infant grows, the gamma chains are gradually replaced by beta chains


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