And so the PKA value decreases. So because of this interaction between the zinc atom and the water, we basically decrease the PTA value of this reaction. And by decreasing the PTA value, we essentially make it much more likely that the water will dissociate and produce that hydroxide. And it's the hydroxide that will be more likely to actually react with the carbon of the carbon dioxide. So based on experimental data, we see that the binding of the zinc atom to water lowers the PKA value of water from 15.7 to 7.0. And this makes water much more likely to give up its hydrogen ion and become a hydroxide ion.