✦ LIBER ✦

The role of the accessory bacteriochlorophyll in reaction centers of photosynthetic bacteria: intermediate acceptor in the primary electron transfer?

✍ Scribed by M. Bixon; J. Jortner; M.E. Michel-Beyerle; A. Ogrodnik; W. Lersch

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 545 KB
Volume: 140
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(87)80500-6

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✦ Synopsis

Time-resolved spectroscopy in conjunction with magnetic-field-dependent recombination dynamics of the primary radical ion pair in reaction centers of Rb. sphaeroides R26, were used to analyze the mechanism of electron transfer from the bacteriochlorophyll dimer in its excited singlet state ( 'P*) to bacteriopheophytin (H). This analysis provides evidence against the participation of the accessory bacteriochlorophyll (B) as a kinetic intermediate and thus favours a single-step electron transfer, which is mediated by superexchange electronic interactions.

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