So step two is basically a hydration step, and it is catalyzed by an enzyme known as Enoil coenzyme hydrates. So we take this same product molecule, TransDelta Two, inoil coenzyme A. And now it acts as a reactant in this particular step. 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.