It contains many enzymes and many intermediates. So we're going to simply paint the general picture of this cycle. Let's begin with step number one. Now, in step number one, we take our acetylcoenzyme A, and we mix it with a four carbon molecule known as oxaloacetate. So the oxalo acetate is a four carbon molecule that when we mix it with acetyl coenzyme A, we form a molecule known as citral coenzyme A, and then that citral coenzyme A reacts with an H 20 molecule to release the coenzyme A cofactor and to produce a six carbon citrate molecule. Now, the fact that this contains six carbons makes sense because our oxyloacetate contained four carbons, and the acetyl portion of the acetyl coenzyme contains two carbons.