If the cell is a fermenter, the pyruvate will be decarboxylated to acetaldehyde, which will be reduced to ethanol, or grain alcohol. Thus ends the overview of glycolysis. Figure 3 looks terribly complicated. It is not. We'll explore each set of pathways in detail, finally tying them together so that you can see how ATP is produced, ultimately.
Glycolysis occurs in the cytosol of eukaryotes and prokaryotes.
Cells do not like to use DHAP for glycolysis, as mentioned, before. While this is all fine and dandy, it is, nevertheless, not a lot of energy. 2 NADH molecules are also formed in the intermembrane space. The significance of iCDH is that it is the first enzyme in the TCA that catalyzes the formation of energy. 2 molecules of NAD are reduced to 2 molecules of NADH, as well.