Lamprey hemoglobin. Structural basis of the bohr effect.

Abstract excerpt

Lampreys, among the most primitive living vertebrates, have hemoglobins (Hbs) with self-association and ligand-binding properties very different from those that characterize the alpha(2)beta(2) tetrameric Hbs of higher vertebrates. Monomeric, ligated lamprey Hb self-associates to dimers and tetramers upon deoxygenation. Dissociation to monomers upon oxygenation accounts for the cooperative binding of O(2) and its...

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