Now, once this goes into the citric acid cycle, it combines with a four carbon molecule called oxalo acetate. And this is the same oxyacetate that is formed in the process of gluco neogenesis. So we can see that the oxalo acetate form in a citric acid can be used by gluconyogenesis to actually form glucose molecules. So in step number one, the two carbon acetal group of acetyl, Coenzyme A, is combined with the four carbon oxylacetate to form this six carbon molecule known as the tricarboxylic acid. And that's why sometimes we call it the tricarboxylic acid cycle TCA cycle. Now, in the next two steps, in step two and three, we undergo a decarboxylation reaction, an oxidation reduction reaction.