Electron carriers in the newly discovered bacterium: Oxidant NAD flavoprotein b (FPb) (oxidized) cytochrome c (Fe³+) Fe-S protein (oxidized) flavoprotein a (FPa) (oxidized) Reductant NADH flavoprotein b Electrons transferred El° (V) 22 -0.32 -0.62 (reduced) cytochrome c (Fe2+) 1 +0.22 Fe-S protein 2 +0.89 (reduced) flavoprotein a 2 +0.77 (reduced)