And in step number three, what happens is we have another catalytic domain that is part of the FAS molecule known as malanil transasilise catalyzed, the formation of a bond between this molecule here and this sulf hydro group of that ACP group found on that FAS. And so we generate this intermediate. And now in this intermediate, we have that acetyl group attached onto the cysteine, and we have the marinade group that's attached onto that sulfidel of this ACP molecule. 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.