That regenerates the NAD plus coenzymeter for glycolysis. And what this process also does is it passes those high energy electrons from the NADH onto a molecule known as DHAP, dihydroxy acetone phosphate. And this is the same molecule that we find as an intermediate in the glycolytic pathway. So in process one, NADH plus a proton reacts with the DHAP and intermediate of glycolysis. So we essentially reduce this molecule into g three P, where g three P stands for glycerol three phosphate. And that's why this is known as the glycerol three phosphate shuttle, because once we form the g three P, the g three P can now move across the outer membrane of the mitochondria and enter the intermembrane space.