What is the impact of the absence of oxygen on Haemoglobin structure?
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Cooperativeness occurs as a result of a change in the hemoglobin structure. In the deoxy form (where oxygen is absent), hemoglobin exists in the T (tense)-state. Upon oxygenation, the dimers in hemoglobin shift by 15 degrees and the R (relaxed)-state is adopted. The R-state form has a much higher affinity for oxygen
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