So this enzyme used the water molecule to basically attach a hydroxyl group onto carbon three, onto the beta carbon. And so we transformed this double bond here into this alcohol group that is now attached onto the carbon, the third carbon, the beta carbon. And notice that if we begin with the transversion, which we do in this particular case, this enzyme will act on the transversion and form the l isomer. If this was the cyst, the enol Co enzyme, hydrates would still be able to act on this CIS structure, but it would form the deisomer. But in this particular case, because we do have the trans, we're only going to form the l isomer of three hydroxy acyl coenzyme A. Now, this is important because the enzyme that catalyze the third step only acts on the l molecule, the l isomer, not the deisomer.