So the four carbon molecule oxyloacetate is ultimately combined with this two carbon component, the CETL group of acetyl coenzyme A, to form a six carbon molecule 123456, known as citrate. Now, citrate is the conjugate base of citric acid and citric acid is an example of a tricarboxylic acid. And that's why the citric acid cycle is also sometimes known as the TCA cycle, tricarboxylic acid cycle. And of course, we also regenerate the coenzyme A. And the coenzyme A can now be reused in the process of pyruvate carboxylation. Now, as we can see from the following overall reaction, step one of the citric acid cycle is actually a multi step process.