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Answer Posted / supraja
BPG also known as 2,3 diphosphoglyceratye binds to
haemoglobin by lowering the o2 affinity of haemoglobin.
in the absence of BPG the p50 of haemoglobin is 1 torr in
its presence p50 becomes 26 torrs.
BPG lowers the o2 affinity of haemoglobin by a factor of 26
which is estimated in enabling haemoglobin to unload o2 in
tissue capillaries.
BPG reduces the o2 affinity of hb by binding in the
central cavity of deoxy haemoglobin and not to oxygenated form.
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