On the Excited State Energy Surface of Rhodopsin and Bacteriorhodopsin

  • S. Rackovsky
  • A. Lewis
Conference paper
Part of the Springer Series in Chemical Physics book series (CHEMICAL, volume 4)


Recently, LEWIS has proposed a molecular mechanism of excitation in visual transduction and bacteriorhodopsin [1]. There are three essential elements in this mechanism:
  1. (1)

    Vertical excitation of the retinal chromophore produces electron density rearrangement.

  2. (2)

    A bond rearrangement in the protein lowers the energy of this excited retinal-protein complex.

  3. (3)

    Torsional motion and rearrangement of the chromophore couples the molecule back onto the ground state surface and stabilizes the new protein conformation.



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Copyright information

© Springer-Verlag Berlin Heidelberg 1978

Authors and Affiliations

  • S. Rackovsky
    • 1
  • A. Lewis
    • 1
  1. 1.Department of Chemistry and School of Applied and Engineering PhysicsCornell UniversityIthacaUSA

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