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Overview[edit] A carbonic anhydrase, or carbonate dehydratase, is a type of enzyme that rapidly catalyzes the conversion of carbon dioxide into a proton and the bicarbonate ion (HCO3-).
The electron rich oxygen of water donates an electron pair to the carbon. After proton transfer from water to an oxygen of the CO 2 unit, carbonic acid is formed.The reaction between water and dissolved carbon dioxide is reversible and rapid.Carbonic acid is in equilibrium with the bicarbonate anion.