So we form this pi bond. And in the final step, we once again want to reduce this. We want to add the h atoms along with our electrons, and we generate the activated fatty acid. And so we see that in this particular case, one cycle of the breakdown of fatty acids basically shortens that carbon chain by two carbons. But in this particular case, it increases that carbon chain by two carbons. So once again, the synthesis process is a reductive process that builds up the hydrocarbon chain of fatty acids.