Haemoglobin and The Bohr Effect
- Created by: lucyholly16
- Created on: 01-02-15 18:35
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- Haemoglobin
- Haemoglobin is made up of:
- 4 globular proteins (amino groups)
- 1 iron ion (prosthetic group)
- Haemoglobin is the molecule that allows erythrocytes to carry respiratory gases (especially oxygen)
- It has an affinity for oxygen (can carry 4 O2 molecules)
- When haemoglobin becomes oxygenated, it is known as oxyhaemoglobin
- The Bohr Effect
- The reaction happens both ways (reversible reaction)
- In high level so oxygen, the arrow moves towards forming oxyhaemoglobin because there's more oxygen. More likely to be forming (lungs)
- Low levels, arrows towards oxygen, less oxygen been used by the cells. More likely to be breaking
- Dissociation - the breaking of oxygen from haemoglobin
- Affinity - the natural force pulling the oxygen to the haemoglobin
- Partial pressure/oxygen tension - the pressure of oxygen in the air you breathe in
- Increase n oxygen tension, likelihood of oxygen binding with haemoglobin increases
- Decrease more likely to dissociate into oxygen and haemoglobin.
- 4 protein molecule, 2 beta and 2 alpha glucose (what oxygen links to) 4 globular
- Loading Tension
- Carbon dioxide affects the affinity to the haemoglobin to oxygen
- More CO2, makes haemoglobin give up oxygen
- H+ + haemoglobin --> haemoglobic acid
- Haemoglobin is made up of:
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