Table of standard reduction potentials for half-reactions important in biochemistry

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The values below are standard reduction potentials for half-reactions measured at 25°C, 1 atmosphere and a pH of 7 in aqueous solution.


Half-reaction Δξ°'(V)
CH3COOH + 2 H+ + 2 e- → CH3CHO + H2O -0.581
2 H+ + 2 e- → H2 -0.421
NADP+ + H+ + 2 e- → NADPH -0.320
FAD + 2 H+ + 2 e- → FADH2 (coenzyme bonded to flavoproteins) ~0
O2 + 2 H+ + 2 e-H2O2 +0.7
1/2 O2 + 2 H+ + 2 e- → H2O +0.815
P680+ + e- → P680 ~ +1.0




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