Overview Other names Krebs cycle, tricarboxylic acid (TCA) cycle Function generate high amounts of NADH/FADH2 that act as fuel for ATP synthesis in the electron transport chain Pathway occurs in the mitochondria requires O2 to function net equation login to view 5 more bullets Important enzymes login to view 18 more bullets important intermediates login to view 9 more bullets Regulation energy status control login to view 1 more bullet