Now, previously, we focused on the nonoxidative phase and we saw that in the nonoxidative phase, we have two important enzymes that helped catalyze that particular reaction, that particular phase. And these two enzymes were transaldelase and transketelase. So in this lecture, I'd like to focus on the reaction mechanism of transheatalase. So transketilase is the enzyme that catalyze the transfer of the two carbon component from one sugar molecule onto another sugar molecule. The question is, how does that reaction actually take place? Well, that reaction occurs as a result of the presence of an important Cofactor molecule, a prosthetic group known as Thiamine Pyrophosphate or TPP.