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Role of zinc ions, zinc ions, zinc ions acts as zinc ions, acts as levice acid, levice acid able to coordinate, able to coordinate with carbonyl oxygen, with carbonyl oxygen, oxygen of the, of the cytidine, of the cytidine, this coordination, coordination results, results activation, activation of carbonyl group, carbonyl group making it, making it more, making it more susceptible, more susceptible, susceptible to nucleophilic attack, nucleophilic attack, attack by the water molecules, by the water molecules, the zinc ion, the zinc ions also stabilize, also stabilize, stabilizes the intermediate, the stabilizes the intermediate, mediate formed, formed after the attack of, after the attack of water molecule, water molecule by coordinating, by coordinating, coordinating with oxygen atom, with oxygen atom, atoms of the substrate, of the substrate...