title: The hemoglobin tetramer: a three-state molecular switch for control of ligand affinity.
mesh_terms: D000494:Allosteric Regulation; D002263:Carboxyhemoglobin; D006454:Hemoglobins / Q000502:physiology*; D006801:Humans; D008024:Ligands; D046911:Macromolecular Substances; D009682:Magnetic Resonance Spectroscopy; D008962:Models, Theoretical; D010108:Oxyhemoglobins; D011487:Protein Conformation; D013329:Structure-Activity Relationship; D013816:Thermodynamics
chemical_list: D006454:Hemoglobins; D008024:Ligands; D046911:Macromolecular Substances; D010108:Oxyhemoglobins; D002263:Carboxyhemoglobin