FILL IN EVALUATION FORM  

OXYGEN DISSOCIATION CURVE

S-shaped (sigmoidal) curve that shows the partial pressures of oxygen (PO2) in relation to the
% saturation of haemoglobin. At 50 % saturation (indicated on the curve by p50), half of the haemoglobin binding sites contain oxygen molecules.

Image adapted from Haemoglobin, BioNet
Permission granted by Dr J M Basford,
University of Cardiff

Undergraduates click here for more information on the co-operative binding of oxygen and the sigmoidal shape of the dissociation curve

Undergraduates click here for information on the effect of pH, CO2 & temperature on dissociation curves

Undergraduates click here for information on the oxygen dissociation curve for myoglobin