Half-Reaction go' (V) 10, + 2H+ + 2 e = H,0 0.815 NO, + 2 H* + 2 e = NO, + H,0 Cytochrome a, (Fet) + e= cytochrome a, (Fe?+) O, + 2H+ + 2 e=H,0, 0.42 0.385 0.295 Cytochrome a (Fe* ) +e= cytochrome a (Fe2+) 0.29 Cytochrome c (Fe+) + e = cytochrome c (Fe?+) Cytochrome c, (Fe+) + e = cytochrome c, (Fe2+) Cytochrome b (Fe*) +e= cytochrome b (Fe2+ )(mitochondrial) 0.235 0.22 0.077 Ubiquinone + 2H* + 2e = ubiquinol 0.045 Fumarate + 2 H* + 2e = succinate 0.031 FAD + 2 H* + 2e=FADH, (in flavoproteins) -0.040 Oxaloacetate + 2 H+ + 2 e = malate -0.166 Pyruvate + 2 H+ + 2 e = lactate -0.185 Acetaldehyde + 2 H+ + 2 e = ethanol -0.197 FAD + 2 H* + 2 e = FADH, (free coenzyme) -0.219 S + 2H+ + 2 e =H,S -0.23 Lipoic acid + 2 H* + 2e= dihydrolipoic acid -0.29 NAD+ + H+ + 2e = NADH -0.315 NADP+ + H+ + 2e = NADPH -0.320 Cysteine disulfide + 2H+ + 2 e =2 cysteine -0.340 Acetoacetate + 2 H* + 2 e = B-hydroxybutyrate -0.346 H+ + e =H, -0.421 So- + 2 H+ + 2 e = SO + H,0 -0.515 Acetate + 3 H* + 2e = acetaldehyde + H,0 -0.581

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
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Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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Refer to Table to explain why FAD rather than NAD+ is used in the succinate dehydrogenase reaction.

Half-Reaction
go' (V)
10, + 2H+ + 2 e = H,0
0.815
NO, + 2 H* + 2 e = NO, + H,0
Cytochrome a, (Fet) + e= cytochrome a, (Fe?+)
O, + 2H+ + 2 e=H,0,
0.42
0.385
0.295
Cytochrome a (Fe* ) +e= cytochrome a (Fe2+)
0.29
Cytochrome c (Fe+) + e = cytochrome c (Fe?+)
Cytochrome c, (Fe+) + e = cytochrome c, (Fe2+)
Cytochrome b (Fe*) +e= cytochrome b (Fe2+ )(mitochondrial)
0.235
0.22
0.077
Ubiquinone + 2H* + 2e = ubiquinol
0.045
Fumarate + 2 H* + 2e = succinate
0.031
FAD + 2 H* + 2e=FADH, (in flavoproteins)
-0.040
Oxaloacetate + 2 H+ + 2 e = malate
-0.166
Pyruvate + 2 H+ + 2 e = lactate
-0.185
Acetaldehyde + 2 H+ + 2 e = ethanol
-0.197
FAD + 2 H* + 2 e = FADH, (free coenzyme)
-0.219
S + 2H+ + 2 e =H,S
-0.23
Lipoic acid + 2 H* + 2e= dihydrolipoic acid
-0.29
NAD+ + H+ + 2e = NADH
-0.315
NADP+ + H+ + 2e = NADPH
-0.320
Cysteine disulfide + 2H+ + 2 e =2 cysteine
-0.340
Acetoacetate + 2 H* + 2 e = B-hydroxybutyrate
-0.346
H+ + e =H,
-0.421
So- + 2 H+ + 2 e = SO + H,0
-0.515
Acetate + 3 H* + 2e = acetaldehyde + H,0
-0.581
Transcribed Image Text:Half-Reaction go' (V) 10, + 2H+ + 2 e = H,0 0.815 NO, + 2 H* + 2 e = NO, + H,0 Cytochrome a, (Fet) + e= cytochrome a, (Fe?+) O, + 2H+ + 2 e=H,0, 0.42 0.385 0.295 Cytochrome a (Fe* ) +e= cytochrome a (Fe2+) 0.29 Cytochrome c (Fe+) + e = cytochrome c (Fe?+) Cytochrome c, (Fe+) + e = cytochrome c, (Fe2+) Cytochrome b (Fe*) +e= cytochrome b (Fe2+ )(mitochondrial) 0.235 0.22 0.077 Ubiquinone + 2H* + 2e = ubiquinol 0.045 Fumarate + 2 H* + 2e = succinate 0.031 FAD + 2 H* + 2e=FADH, (in flavoproteins) -0.040 Oxaloacetate + 2 H+ + 2 e = malate -0.166 Pyruvate + 2 H+ + 2 e = lactate -0.185 Acetaldehyde + 2 H+ + 2 e = ethanol -0.197 FAD + 2 H* + 2 e = FADH, (free coenzyme) -0.219 S + 2H+ + 2 e =H,S -0.23 Lipoic acid + 2 H* + 2e= dihydrolipoic acid -0.29 NAD+ + H+ + 2e = NADH -0.315 NADP+ + H+ + 2e = NADPH -0.320 Cysteine disulfide + 2H+ + 2 e =2 cysteine -0.340 Acetoacetate + 2 H* + 2 e = B-hydroxybutyrate -0.346 H+ + e =H, -0.421 So- + 2 H+ + 2 e = SO + H,0 -0.515 Acetate + 3 H* + 2e = acetaldehyde + H,0 -0.581
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