Page "Hemoglobin" Paragraph 58
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Hemoglobin can bind protons and carbon dioxide, which causes a conformational change in the protein and facilitates the release of oxygen.
This decrease in hemoglobin's affinity for oxygen by the binding of carbon dioxide and acid is known as the Bohr effect ( shifts the O < sub > 2 </ sub >- saturation curve to the right ).
Conversely, when the carbon dioxide levels in the blood decrease ( i. e., in the lung capillaries ), carbon dioxide and protons are released from hemoglobin, increasing the oxygen affinity of the protein.
A reduction in the total binding capacity of hemoglobin to oxygen ( i. e. shifting the curve down, not just to the right ) due to reduced pH is called the root effect.
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