Glutathione System from Cyanobacteria to Higher Eukaryotes Encyclopedia MDPI Conversion oxidized glutathione (GSSG) to the reduced form (GSH) by Download Scientific Diagram 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 Structure and mechanism of mammalian thioredoxin reductase: The active site is a redox active selenolthiol selenenylsulfide formed from the conserved cysteine selenocysteine sequence PNAS