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. So in the second step, we have the enzyme in oil, coenzyme A. hydratase adds a hydroxyl group onto the beta carbon, and this creates the l isomer version of hydroxy acyl coenzyme A. Now let's move on to the third step. In the third step, we have a second oxidation step actually taking place.