Now, recall that proponel coenzyme A is essentially obtained is obtained when we metabolize odd chain fatty acids. So the final product of the metabolism of odd chain fatty acids is, in fact, a ProPanel coenzyme A in the same way that we have this proponel coenzyme A when we metabolize our methionine. So every step from this step onward is exactly the same as we discussed for the metabolism of odd chain fatty acids. So we take the proponel coenzyme A, the enzyme proponel coenzyme A carboxylase. So carboxylase means it has to have a carbon source. It uses biotin and it has to have an energy source.