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. 2015 Mar 12;81(7):2612–2624. doi: 10.1128/AEM.04016-14

TABLE 5.

Dissociation constants for the hydrolysis of p-nitrophenyl butyrate by the cobalt, zinc, and copper forms of MolA

Enzyme pKa1 pKa2
Cobalt MolA 6.45 9.50
Zinc MolA 6.73 9.36
Copper MolA 5.56 7.56