Respiratory pigments
Respiratory pigments are coloured molecules which act as oxygen Carriers by binding reversibly to oxygen.
There are only two well known respiratory pigments :-
Haemoglobin
Myoglobin
Haemoglobin it contains 4 globin protein chains is associated with haem an iron containing group which combines loosely with oxygen and in this way oxygen is carried in the blood where has at low oxygen concentration the oxygen is quickly released
Myoglobin it consists of one polypeptide chain. This change is associated with an iron containing ring structure. This iron can bind with one molecule of oxygen. it is found in skeletal muscles and is the main reason why meat appears red.myoglobin releases oxygen when the partial pressure of oxygen is below 20 mm HG. in this way it act as a store of Oxygen and resting muscle only releasing date when suppliers of oxyhaemoglobin have been exhausted.
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Respiratory pigments are coloured molecules which act as oxygen Carriers by binding reversibly to oxygen.
There are only two well known respiratory pigments :-
Haemoglobin
Myoglobin
Haemoglobin it contains 4 globin protein chains is associated with haem an iron containing group which combines loosely with oxygen and in this way oxygen is carried in the blood where has at low oxygen concentration the oxygen is quickly released
Myoglobin it consists of one polypeptide chain. This change is associated with an iron containing ring structure. This iron can bind with one molecule of oxygen. it is found in skeletal muscles and is the main reason why meat appears red.myoglobin releases oxygen when the partial pressure of oxygen is below 20 mm HG. in this way it act as a store of Oxygen and resting muscle only releasing date when suppliers of oxyhaemoglobin have been exhausted.
If you find this post useful please share it and comment for any questions
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