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Reaction Centers of Photosynthetic Bacteria pp 31–44Cite as

Infrared Difference Spectroscopy of Electro-chemically Generated Redox States in Bacterial Reaction Centers

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Part of the book series: Springer Series in Biophysics ((BIOPHYSICS,volume 6))

Abstract

In bacterial photosynthetic reaction centers (RC), about 40% of the energy of the absorbed photon or trapped exciton are stored in a charge-separated state, whose free energy can be used by secondary redox reactions. This charge-separated state is created in a sequence of steps; i.e. an electron is transferred from the primary electron donor P (a bacteriochlorophyll dimer, BChl2) via a monomeric bacteriochlorophyll B to an intermediary electron acceptor H (a bacteriopheophytin, BPheo), and from there to a primary and secondary quinone acceptor QA and QB, thus creating a P+Q− state (for a review, see [1]). The free energy stored in this state can be expressed as the sum of the energy needed to shift the redox poise of P/P+ and of Q/Q− from the quiescent state of the RC, where both P and Q are neutral, to an accumulation of the charged radicalic species.

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Author information

Authors and Affiliations

  1. Institut für Biophysik und Strahlenbiologie, Universität Freiburg, Abertstraße 23, W 7800, Freiburg, Germany

    W. Mäntele, M. Leonhard, M. Bauscher & D. A. Moss

  2. Service de Biophysique, CEN Saclay, 91191, Gif-sur-Yvette, France

    E. Nabedryk & J. Breton

Authors
  1. W. Mäntele
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  2. M. Leonhard
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  3. M. Bauscher
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  4. E. Nabedryk
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  5. J. Breton
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  6. D. A. Moss
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Editor information

Editors and Affiliations

  1. Institut für Physikalische und Theoretische Chemie, Technische Universität München, Lichtenbergstraße 4, Garching, W 8046, Germany

    Maria-Elisabeth Michel-Beyerle

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© 1990 Springer-Verlag Berlin Heidelberg

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Mäntele, W., Leonhard, M., Bauscher, M., Nabedryk, E., Breton, J., Moss, D.A. (1990). Infrared Difference Spectroscopy of Electro-chemically Generated Redox States in Bacterial Reaction Centers. In: Michel-Beyerle, ME. (eds) Reaction Centers of Photosynthetic Bacteria. Springer Series in Biophysics, vol 6. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-61297-8_4

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  • DOI: https://doi.org/10.1007/978-3-642-61297-8_4

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-64781-9

  • Online ISBN: 978-3-642-61297-8

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