And this takes place on the matrix side of this complex one. So once again, the NADH molecule donates the two electrons onto an acceptor group found on the vertical component of complex one known as flavin mononucleotide fmmen. The FMN is reduced into FMM H two. And this prosthetic group contains the same isoloxazine ring that we find on the fad molecule. So the fad is similar to FMN in the sense that they contain the same three member ring that is used to actually form that or actually use ticketstrack and collect those electrons. Now, once we reform the NAD plus, that NAD plus can be reused by the process of the citric acid cycle, or Glycolysis, where the NAD plus molecules are needed to actually oxidize the glucose derivative and abstract those electrons.