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The antimycin‐sensitive electrogenesis in Rhodopseudomonas sphaeroides chromatophores
Author(s) -
Drachev Lel A.,
Mamedov Mahir D.,
Semenov Alexey Yu.
Publication year - 1987
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(87)81477-1
Subject(s) - chemistry , chromatophore , rhodobacter sphaeroides , photochemistry , antimycin a , electron transfer , biophysics , cytochrome , substrate (aquarium) , electron transport chain , biochemistry , photosynthesis , enzyme , biology , ecology , fishery
Electrogenesis linked to cyclic electron transfer through the ubiquinol‐cytochrome 5c 2 oxidoreductase complex in Rhodopseudomonas sphaeroides chromatophores was investigated by a direct electrometric method. Rapid kinetic measurements of laser flash‐induced ΔΨ generated in chromatophores associated with a phospholipid‐impregnated collodion film revealed an exponential rise ofΔΨ with a τ of ~ 700 μs. This exponential electrogenic phase contributes about 11% of the total photoelectric response and is sensitive to antimycin.