Structural and Functional Aspects of the Photosynthetic Electron Transport Chain of Rhodobacter Capsulatus

  • Giovanni Venturoli
  • B. Andrea Melandri
Part of the NATO ASI Series book series (NSSA, volume 168)


The electron transfer chain in membrane fragments of non-sulphur purple bacteria (Rhodospiriiiaceae) such as Rhodobacter sphaeroides and Rb. capsulatus is the simplest and best characterized photosynthetic system under study. It consists of only two electron transfer complexes, the photosynthetic reaction center (RC) and the ubiquinol-cyt. cz oxidoreductase, and of two mobile electron carriers, of which one, ubiquinone-10 (UQ) diffuses in the lipid phase of the membrane, and the second, cyt. cz, interacts with the complexes at the water- membrane interface. A cyclic electron transfer takes place in this system, where the two complexes can exchange electrons through the action of the mobile electron carriers (Crofts and Wraight, 1983; Melandri and Venturoli, 1984; Dutton, 1986).


Electron Transfer Photosynthetic Reaction Center Electron Transfer Chain Midpoint Potential Cyclic Electron Transfer 
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Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • Giovanni Venturoli
    • 1
  • B. Andrea Melandri
    • 1
  1. 1.Department of BiologyUniversity of BolognaBolognaItaly

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