And that's how we're able to actually form odd chain fatty acid molecules. But in this case, we're only going to focus on the even chain fatty acid molecules. So once again, in step three, the melania transatcelase domain of the fatty acid synthase catalyze the transfer of the malinate group from the malanil coenzyme A that we formed here onto the ACP domain. This enzyme domain is highly specific for the malcoenzyme A, unlike this catalytic domain that is not that specific for this acetyl group. And this basically helps prepare the molecule for step four, in which we have a condensation step in which we elongate that fatty acid chain. So let's take a look at step four.