The two carbon component that is removed from the pyruvate, the fad flavin adenineucleotide, is used to pick up the two electrons. And then those two electrons are transferred onto the NAD plus nicotine adenine dinucleotide to form the NADH in the final step, as we'll see in a moment. So let's begin by summarizing the first three steps of this reaction. Why the first three? Well, because the first three are basically used to form that acetyl coenzyme A complex. So in the first step, we have a decrypt oxylation reaction taking place in which this entire component, not including these two electrons in this bond, is basically removed because we want to form the carbon dioxide and we form this intermediate.