Solve for Delta DEo’ and nFDEo’= DGo’ 2. Energetics of the electron transport. In the oxidative phase of oxidative phosphorylation, electrons are passedfrom NADH and ultimately to molecular oxygen through an electron transport chain comprised of multipleredox centers. Assume that an electron is passed through the chain along the route shown below. Clearly, thereare steps missing, but we will skip those to emphasize the energetics of the electron transport. Calculate DEº'and DGº' for each electron transfer step and record the values in the table. The reduction potentials for each ofthe redox centers are given in table 11.1. (F=96.4 kJ/V mol)Route:NADH → (Fe-S)N-5,6 → Coenzyme Q → Cytochrome c₁ → Cytochrome a3 → 0₂Table 11.1 STANDARD REDUCTION POTENTIALS (E°') FOR SELECTEDELECTRON CARRIERS IN THE ELECTRON TRANSPORT SYSTEMElectron carriersNAD + H+ + 2e → NADHComplex I (NADH-ubiquinone oxidoreductase)Fe-S (N-1b)Fe-S (N-3,4)Fe-S (N-5,6)Complex II (succinate dehydrogenase)FAD + 2H+ + 2e →FADH₂ (enzyme bound)Fe-S (S-1)Cytochrome b560Coenzyme Q + 2 H+ + 2e¯Complex III (ubiquinone-cytochrome c oxidoreductase)Cytochrome bCytochrome bFe-SCytochrome c₁Cytochrome c (Cyt c)Complex IV (cytochrome c oxidase)Cytochrome aCUACytochrome azO₂ + 2H+ + 2e → H₂OE° (V)-0.32-0.25-0.24-0.27-0.04-0.03-0.08+0.04+0.03-0.03+0.28+0.21+0.23+0.21+0.24+0.38+0.82Direction of e flowe transferred from toNADH (Fe-S)N-5,6(Fe-S)N-5,6 Coenzyme QCoenzyme Q → Cytochrome c₁Cytochrome c₁ → Cytochrome a3Cytochrome a3 → 0₂AE⁰¹-nFAE⁰¹=AG⁰¹

Standard change in Gibbs free energy (∆G'0 ) of redox reactions can be found, if we know the…

2. Energetics of the electron transport. In the oxidative phase of oxidative phosphorylation, electrons are passed from NADH and ultimately to molecular oxygen through an electron transport chain comprised of multiple redox centers. Assume that an electron is passed through the chain along the route shown below. Clearly, there are steps missing, but we will skip those to emphasize the energetics of the electron transport. Calculate DEº' and DGo' for each electron transfer step and record the values in the table. The reduction potentials for each of the redox centers are given in table 11.1. (F=96.4 kJ/V mol) Route: NADH → (Fe-S)N-5,6 → Coenzyme Q → Cytochrome c₁ → Cytochrome a3 → 0₂

2. Energetics of the electron transport. In the oxidative phase of oxidative phosphorylation, electrons are passed from NADH and ultimately to molecular oxygen through an electron transport chain comprised of multiple redox centers. Assume that an electron is passed through the chain along the route shown below. Clearly, there are steps missing, but we will skip those to emphasize the energetics of the electron transport. Calculate DEº' and DGo' for each electron transfer step and record the values in the table. The reduction potentials for each of the redox centers are given in table 11.1. (F=96.4 kJ/V mol) Route: NADH → (Fe-S)N-5,6 → Coenzyme Q → Cytochrome c₁ → Cytochrome a3 → 0₂

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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