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Describe how Hb binds and transports CO2. Include in your description which functional groups can react...

Describe how Hb binds and transports CO2. Include in your description which functional groups can react with CO2 and where in the structure these groups are found.

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Answer #1

The co2 is transported in blood rbc in three form dissolved , carbamino compound and bicarbonate form .

In dissolved form co2 rapidally hydrateto form H2CO3 due to presence of enzyme Ca in rbc.

in carbamino compound - co2 with amino acid of hemogloboin is form carbamino Hb forming

co2 + HbNH2 = HbNHCOOH

in bicarbonate form co2 is carried with rbc aa pottasium bicarbonate . Within rbc hb is tronger acceptor and rbc are rich in enzyme carbonic anhydrase therefore reaction occur

co2+ H2O = H2co3 = H+ and HCO-

H+ are buffered by hb rapidally and prevent the reaction in opposite direction as a result hb is reduced but hco3- formation is rapid and in large amount due to presence of CA .

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