And so we call this enzyme the mitochondrial version glycerol three phosphate dehydrogenase, or simply the mitochondrial glycerol three phosphate dehydrogenase. Now, what this enzyme actually does is it oxidizes the g three P into DHAP by taking off those two electrons and two protons and placing them onto an Fad molecule that is bound to that enzyme. So Fad is flavin adenine dinucleotide, and it can accept two protons and two electrons. So in step number two, we see that the enzyme transfers the two electrons and two protons from the g three P onto Fad to form the Fadh two. And in the final step of the glycerol 35 state shuttle, the Fadh two is actually oxidized back into Fad. In the process, those two electrons and the two protons that ultimately came from these two reactants here are basically transferred onto a Ubiquinone that is found within the hydrophobic core of the inner membrane of the mitochondria.