Glyceraldehyde 3-Phosphate dehydrogenation

ATP synthesis is also conjugated with glyceraldehydes-3-phosphate dehydrogenation ... 

The NADH is derived from glyceraldehyde 3-phosphate dehydrogenation. Thus, yeast fermentation yields ethanol rather than lactate as an end product of glycolysis. Small amounts of ethanol are produced by the microbial flora of the gastrointestinal tract. Other types of fermentation using similar reactions occur in microorganisms and yield a variety of products (e.g., acetate, acetone, butanol, butyrate, isopropanol, hydrogen gas). 

Dehydrogenation of Glyceraldehyde Phosphate. Next, the aldehyde group of the triose is dehydrogenated to yield the carboxylic acid. This reaction could proceed in the simplest possible way, since it is strongly exergonic ... 

Warburg showed how ATP formation is coupled to the dehydrogenation of glyceraldehyde-3-phosphate. 

In glycolysis, dehydrogenation of the two molecules of glyceraldehyde 3-phosphate derived from each molecule of glucose converts two molecules of NAD to two of NADH. Because the reduction of two molecules of pyruvate to two of lactate regenerates two molecules of NAD, there is no net change in NAD or NADH ... 

Trioses. n-Glyceraldehyde (formula in Section 1) is the dehydrogenation product of glycerol. More important, however, is 3-phosphoglyceraldehyde, an intermediate in the degradation of carbohydrates (Chapt. XVII-6), which is in equilibrium with dihydroxyacetone phosphate the attainment of equilibrium is catalyzed by the enzyme triose phosphate isomerase (cf. Section 7). 

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