And so once again, this same isomerase has to act on this molecule to basically change the position and the location. So the position and the configuration of this double bond. So we go from a sith double bond between carbon three and carbon four to a trans double bond between carbon two and carbon three. And so once we form this intermediate, this is a trans delta two enol coenzyme A, as we saw in this particular case. Now this can basically complete that beta oxidation pathway to basically form a CIS delta four enol coenzyme A molecule that now contains only one double bond, as can be seen between the carbon four and carbon five. Now, this molecule is a substrate to two acyl coenzyme a dehydrogenase.