So the two ATP molecules are produced directly and then we also form the ATP via the oxidative phosphorylation that takes place on the electron transport chain. And this ranges anywhere from three to five ATP depending on the type of shuttle that the cell actually uses. Now the two Pyruvate molecules produced in the cytoplasm then move into the matrix of the mitochondria. And in the matrix we have Pyruvate decarboxylation that transforms the two Pyruvate into two acetyl coenzyme A molecules. And in the process we also generate the two NADH molecules and the two NADH molecules because they're produced directly in the matrix of the mitochondria, they move directly onto complex one. And so a single NADH oxidized by the electron transport chain in the matrix goes through all these complexes.