EFFECTS OF PLANT FLAVONOIDS ON Manduca sexta (TOBACCO HORNWORM) FIFTH LARVAL INSTAR MIDGUT AND FAT BODY MITOCHONDRIAL TRANSHYDROGENASE

The reversible, membrane‐associated transhydrogenase that catalyzes hydride‐ion transfer between NADP ( H ) and NAD ( H ) was evaluated and compared to the corresponding NADH oxidase and succinate dehydrogenase activities in midgut and fat body mitochondria from fifth larval instar M anduca sexta. The developmentally significant NADPH ‐forming transhydrogenation occurs as a nonenergy‐ or energy‐linked activity with energy for the latter derived...