Question: Riboflavin nutritional status is assessed by measurement of which of the following enzymes after addition of FAD in vitro? (A): Transketolase (B): Glutathione reductase (C): Transaminase (D): Transaldolase Let us know The Glutathione System: A Journey from Cyanobacteria to Higher Eukaryotes Glutathione Reductase an overview ScienceDirect Topics Item Scheme showing the enzymatic reactions that catalyze the pyruvate dehydrogenase complex, including pyruvate dehydrogenase activity and diaphorase activity of DLD (A) as well as the glutathione reductase peroxidase activity (B).