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10 cards from this deck
Globular protein with quaternary structure
4 oxygen molecules (one per haem group)
Each O₂ binding makes next O₂ easier to bind
S-shaped (sigmoidal)
Increased CO₂ decreases O₂ affinity, shifts curve right
Has 2 gamma (γ) chains instead of 2 beta (β) chains
70-90% as hydrogen carbonate (HCO₃⁻) ions
Carbonic anhydrase
Cl⁻ into RBC, HCO₃⁻ out of RBC (ion exchange)
H⁺ ions, forming haemoglobinic acid (HHb)
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