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Plant and Cell Physiology, 2000, Vol. 41, No. 12 1347-1353
© 2000 Oxford University Press

Isolation and Purification of the Reaction Center (RC) and the Core (RC-LH1) Complex from Rhodobium marinum: the LH1 Ring of the Detergent-Solubilized Core Complex Contains 32 Bacteriochlorophylls

Pu Qian1, Tatsuo Yagura1, Yasushi Koyama ,1,3 and Richard J. Cogdell2

1 Faculty of Science, Kwansei Gakuin University, Uegahara, Nishinomiya, 662-8501 Japan 2 Division of Biochemistry and Molecular Biology, Institute of Biochemistry and Life Sciences, University of Glasgow, Glasgow G12 8QQ, U.K.

The reaction center (RC) and the core (RC-LH1) complex were isolated and purified from Rhodobium marinum; together with the LH1 complex [Meckenstock et al. (1992a) FEBS Lett. 311: 128], a complete set of RC, LH1 and RC-LH1 from the same wild-type strain of a purple photosynthetic bacterium can therefore now be made. Comparison of the BChl a/BPhe a ratio (determined by HPLC) between the RC and the RC-LH1 complexes lead us to the determination of the number of BChls in the LH1 ring to be 32.06±2.90, indicating that the LH1 ring from Rh. marinum consists of 16 {alpha}ß subunits.

3 Corresponding author: E-mail, ykomyama@kwansei.ac.jp; Fax, +81-798-51-0914.


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