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Size and structure of antenna complexes of photosynthetic bacteria as studied by singlet-singlet quenching of the bacteriochlorophyll fluorescence yield

Authors
  • Van Grondelle, Rienk
  • Hunter, C.Neil
  • Bakker, Jacques G.C.
  • Kramer, Herman J.M.
Type
Published Article
Journal
Biochimica et Biophysica Acta (BBA) - Bioenergetics
Publisher
Elsevier
Publication Date
Jan 01, 1983
Volume
723
Issue
1
Pages
30–36
Identifiers
DOI: 10.1016/0005-2728(83)90005-1
Source
Elsevier
Keywords
License
Unknown

Abstract

We have measured the singlet-singlet quenching of the bacteriochlorophyll (BChl) fluorescence yield as a function of excitation intensity in a number of antenna complexes isolated from photosynthetic bacteria. Our results show that the lithium dodecyl sulfate (LDS)-B875, LDS-B800 – 850 and lauryldimethylamine N-oxide complexes of Rhodopseudomonas sphaeroides contain 8, greater than 25 and greater than 600 BChl a molecules, respectively. The size of the Rhodopspirillum rubrum B880 complex is greater than 70 BChl a and that of the water-soluble BChl a complex from Prosthecochloris aestuarii about 20–25 BChl a. These results are discussed in relation to current models of the arrangement of antenna complexes within the photosynthetic membranes.

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