Question: Thiamine pyrophosphate (PPT) is not coenzyme of: 
 Options:  <1> Pyruvate dehydrogenase (synthesis of acetyl CoA). <2> Alpha-ketoglutarate dehydrogenase (citric acid cycle). <3> Transketolase (pentose phosphate pathway). <4> Transaldolase (pentose phosphate route). <5> Pyruvate decarboxylase (ethanolic fermentation).
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