Now, one important difference between this catalytic domain and this catalytic domain is this catalytic domain is much more specific for this molecule than this domain is specific for this molecule. In fact, this domain here can actually bind other carbon molecules. In fact, it can bind proponel coenzyme A. 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.