34 - LECTURE 34 ANNOUNCEMENTS 1. ASSIGNMENTS FOR THIS WEEK:...

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LECTURE 34 ANNOUNCEMENTS 1. ASSIGNMENTS FOR THIS WEEK: READING AND PROBLEMS AS IN LG. (NO NEW PyMOL ASSIGNMENT UNTIL THE LAST WEEK OF CLASS) FRIDAY’S LECTURE ELECTRON TRANSPORT via THE "RESPIRATORY CHAIN" RXNS AT COMPLEXES I, II, III, IV H + PUMPING: via “PROTEIN STRUCTURAL CHANGE” OR ELSE “Q-CYCLE” ROLE OF MOBILE e - CARRIERS IN/ON MEMBRANES: UQH2 AND Cyt c FAVORABLE G OF NADH OR FADH2 OXIDATION DRIVES H + & ∆ Ψ. EFFICIENT! TODAY ATP SYNTHASE MECHANISM PHOTOSYNTHESIS 2. OFFICE HRS, REVIEWS: NEXT WEEK, NO OFFICE HOURS OR REVIEWS; FOR THE LAST WEEK OF CLASS, NO CHANGES; FOR STUDY WEEK: OFFICE HOURS AND REVIEW HOURS AT THE USUAL TIMES, BUT LOCATIONS AND ADDITIONAL REVIEW WILL BE POSTED IN A FEW WEEKS 3. RACKER LECTURER HERE AT CORNELL THIS WEEK THURSDAY AND FRIDAY: 4. ALTERNATIVE MEETS WESTERN MEDICINE: WED 11/17 AT 5:30PM IN ROCK 122 PS
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THERMODYNAMICS OF THE CHEMIOSMOTIC MECHANISM H + H + MATRIX CYTOSOL G T = RTln [H + ] CYTOSOL [H + ] MATRIX + Z F ∆ Ψ G T = -2.303RT(pH CYTOSOL - pH MATRIX ) + Z F ∆ Ψ G T = + 3kJ/MOL + 14.5kJ/MOL = + 17.5kJ/ MOL TYPICAL VALUES: T = 310K pH CYTOSOL - pH MATRIX ~ - 0.5 ∆ Ψ ~ + 0.15V F = 96.5 kJ/V• mol R = 8.31J/K• mol NADH + H + + 1/2O 2 NAD + + H 2 0 USE VALUES MEASURED FOR THIS RXN IN ACTUAL MITOCHONDRIA, i.e. USING ACTUAL CONC OF NADH, NAD + , O 2 : NAD + / NADH E - 0.28V 1/2O 2 /H 2 0 E + 0.78V G = -n F E = -205 kJ/MOL WHAT VALUE OF G IS ACTUALLY FOUND TO
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This note was uploaded on 12/10/2011 for the course BCHEM 3350 taught by Professor Feig during the Fall '09 term at Cornell.

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34 - LECTURE 34 ANNOUNCEMENTS 1. ASSIGNMENTS FOR THIS WEEK:...

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