Now, in the second step, not shown here, we have the glutamate. And we transform that Glutamate into well, we actually release the ammonium, the ammonium group, from the glutamate, and we reform that alpha key to glutarate. And in this process, we have to use an NAD plus or NADP plus, as well as a water molecule to basically remove that ammonium from glutamate. So that's how we go from Alanine to Pyruvate. Now, Tryptophan basically is transformed into Pyruvate by first converting Tryptophan to Alanine, and then Alanine basically follows this step to form the Pyruvate. Now let's move on to Serene.