|səksə̇n+ noun
Etymology: succin- + oxidase
: the entire complex system containing succinic dehydrogenase and cytochromes that catalyzes the reaction between succinate ion and molecular oxygen with the formation of fumarate ion
in rat liver cells, succinoxidase activity is associated with the mitochondria, and in heart muscle it is localized in particles … that correspond cytologically to the mitochondria of other tissues — J.S.Fruton & Sofia Simmonds