With reference to the structure of hemoglobin and your knowledge of complex formation reactions, discuss the stability...

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Biology

With reference to the structure of hemoglobin and your knowledgeof complex
formation reactions, discuss the stability of oxygenated hemoglobinversus
deoxygenated hemoglobin. Be sure to fully outline yourreasoning.

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3.6 Ratings (523 Votes)

A haemoglobin molecule is composed of four polypeptide globinchains Each contains a haem moiety which has an organic part aprotoporphyrin ring made up of four pyrrole rings and a centraliron ion in the ferrous state Fe2Oxygen binds reversibly to haem so each haemoglobin moleculecan carry up to four oxygen moleculesHaemoglobin is an allosteric protein the binding of oxygen toone haem group increases the oxygen affinity within the remaininghaem groups This cooperativity between the component parts ofhaemoglobin means that oxyhaemoglobin has a substantially differentquaternary structure to deoxyhaemoglobinHemoglobin exists in two forms a taut tense form Tand a relaxed form R Various factors See Answer

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