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. And so we pump out these ten H plus ions and that means a single NADH oxidized by the electron transport chain produced in Pyruvate carboxylation produces 2.5 ATP molecules. And because we have two of these, two multiplied by 2.5 gives us five ATP molecules produced from this process. Now the majority of the NADH are produced in the citric acid cycle.