Midpoint Potentials (Em,7) of Electron Donor and Acceptor
Couples
|
Couples
|
Em,7 (mV)
|
|
1/2 O2/H2-
|
+818
|
|
Fe+2/Fe+3
|
+770
|
|
NH4+/NO2-
|
+440
|
|
NO3-/NO2-
|
+433
|
|
NO3-/NH4+
|
+360
|
|
NO2-/NO3-
|
+350
|
|
1/2
S4O6-2/S2O3-2
|
+170 - +24
|
|
(CH3)2SO/(CH3)2S
|
+160
|
|
(CH3)3NO/CH3)3NH+
|
+130
|
|
Q/QH2 (Ubiquinol)
|
+113
|
|
DMK/demethylmenaquinol
|
+36
|
|
Fumarate/Succinate
|
+30
|
|
S/SO3-2
|
+5
|
|
MK/menaquinol
|
-74
|
|
HSO3-/HS-
|
-111
|
|
DHAP/glyercol-3-P
|
-190
|
|
FMN/FMNH2
|
-190
|
|
Pyruvate/lactate
|
-190
|
|
FAD/FADH2
|
-220
|
|
CO2/CH4
|
-240
|
|
H2S/S0
|
-270
|
|
CO2/acetate
|
-290
|
|
NAD+/NADH
|
-320
|
|
Fdox/Fdred
|
-390 - -420
|
|
S2O3-2/S-2 + HSO3-
|
-400 - 420
|
|
H+/1/2 H2
|
-414
|
|
CO2/HCO2-
|
-432
|
|
SO4-2/HSO3-
|
-520
|