Why are all the reactions in Table 20.1 written as reduction reactions? Table 20.1 Standard Reduction Potentials

Why are all the reactions in Table 20.1 written as reduction reactions?

Transcribed Image Text:

Table 20.1 Standard Reduction Potentials for Several Biological Reduction Half Reactions Reduction Half Reaction O₂ + 2H+ + 2e → H₂O Fe³+ + Fe²+ Cytochrome a, (Fe³+) + e Cytochrome as (Fe²+) Cytochrome a(Fe³+) + e→Cytochrome a(Fe²+) Cytochrome c(Fe³+) + e→Cytochrome c(Fe²+) Cytochrome 4 (Fe³+) + e→Cytochrome 4 (Fe²+) CoQH + H+ e→CoQH₂ (coenzyme Q CoQ+ 2H+ + 2e → CoQH₂ Cytochrome by (Fe³+) + e→Cytochrome b(Fe²+) Fumarate + 2H+ + 2e → Succinate CoQ + H+ + e→CoQH* FAD + 2H+ + 2e → FADH₂ Cytochrome (Fe³+) + e→Cytochrome b (Fe²+) Oxaloacetate + 2H+ + 2e → Malate Pyruvate + 2H+ + 2e → Lactate Acetaldehyde + 2H+ 2e → Ethanol FMN + 2H+ + 2e → FMNH₂ FAD + 2H+ + 2e → FADH₂ 1,3-bisphosphoglycerate + 2H+ + 2e → Glyceraldehyde-3-phosphate + P₁ NAD+ + 2H+ + 2e → NADH + H+ NADP+ + 2H+ + 2e → NADPH + H+ a-Ketoglutarate + CO₂ + 2H+ + 2e → Isocitrate Succinate + CO₂ + 2H+ + 2e → a-Ketoglutarate + H₂O E" (V) 0.816 0.771 0.350 0.290 0.254 0.220 0.190 0.060 0.050 0.031 0.030 0.003-0.091* -0.100 -0.166 -0.185 -0.197 -0.219 -0.219 -0.290 -0.320 -0.320 -0.980 -0.670