And we begin with this acetyl coenzyme a, that contains this two carbon component. And so ultimately, what happens in step one is the enzyme known as citrate synthase. Synthase catalyze. The transfer of this acetyl group from the CETO coenzyme ain onto this oxalo acetate, and that forms this citrate molecule. So citrate is actually a conjugate base of citric acid, and that's why we call this the citric acid cycle. Now, this is also an example of a trichrobaxylic acid, and that's why this is sometimes known as the TCA cycle, trichrobic silic acid cycle.