The electron transport chain
This is the overall reaction for electrons that travel from NADH to O2 NADH + H+ + O2 NAD+ + H2O NAD+ + 2H+ 2e- NADH + H+ E'o = -0. 136 V This is the overall reaction for electrons that travel from FADH2 to O2 FADH2 + O2 FAD + H2O FAD + 2H+ →