MCB 3020C Lecture Notes - Lecture 8: Electron Acceptor, Citric Acid Cycle, Quinone

10 views2 pages
5 Jan 2020
School
Department
Course
Professor

Document Summary

3. 11 electron transport and the proton motive force. Electron transport system oriented in cytoplasmic membrane so that electrons are separated from protons. Two electrons + two protons enter when nadh oxidized to nad+ by nadh dehydrogenase. The final carrier in the chain donates the electrons and protons to the terminal electron acceptor. During electron transfer, protons are released on outside of the membrane: protons originate from 1) nadh and 2) dissociation of water. Results in generation of ph gradient and an electrochemical potential across the membrane: the inside becomes electrically negative and alkaline, the outside becomes electrically positive and acidic. Complex i: nadh oxidized, quinone reduced, four h+ released. Complex ii: bypasses complex i, feeds e- and h+ from fadh2 directly to quinone pool, four fewer h+ pumped per 2e-; reduces atp yield. Complex iii: transfer e- from ubiquinol to cytochrome c, pumps h, cytochrome c shuttles e- to complex ic.

Get access

Grade+
$40 USD/m
Billed monthly
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
10 Verified Answers
Class+
$30 USD/m
Billed monthly
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
7 Verified Answers

Related Documents

Related Questions