Operation of UQH2: CYT C2 Oxidoreductase of R. sphaeroides in the Steady State

  • Yue Chen
  • Antony Crofts


Measurement of the thermodynamic poise of redox components of electron transfer chains under coupled conditions has been used extensively in the mitochondrial field to analyze through “cross-over points” the contributions to different spans to the work required to drive ATP synthesis, or maintain the proton gradient. In the work described in this paper, a steady state approach has been developed by which the redox poise of the electron transfer chain, the electron flux and H+-gradient could be simultaneously monitored, and the approach to the coupled steady-state (static head) could be followed kinetically on illumination of chromatophores from Rhodobacter sphaeroides.


Electron Flux Proton Gradient Rhodobacter Sphaeroides Redox Center Electron Transfer Chain 
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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Yue Chen
    • 1
  • Antony Crofts
    • 1
  1. 1.Dept. of Physiology and BiophysicsUniversity of IllinoisUrbanaUSA

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