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. So in step one in the cytoplasm, NADH produced in glycolysis is oxidized back into NAD. Plus, by reducing dihydroxy acetone phosphate DHAP into glycerol three phosphate g three P. And this reaction allows us to regenerate the energy plus. Needed for the glycolytic pathway and also allows us to actually pass down the electrons onto a molecule that can now move into the intermembrane space of the mitochondria.