Abstract
The electron-transfer chain components of aerobically grown Chromatium vinosum have been characterized. Membranes isolated from aerobically grown C. vinosum have been shown to contain a Rieske iron-sulfur protein, at least three c-type cytochromes and at least one b-type cytochrome. Two cytochromes that bind CO appear to be present, one of which may function as a terminal oxidase. Membranes isolated from these cells appear to lack a photochemical reaction center and the high potential (Em = +340 mV) cytochrome c-555 that serves as the immediate donor to the reaction center in photosynthetically grown C. vinosum. In addition, the b-cytochrome(s) of aerobically grown C. vinosum has (have) been shown to be considerably more electronegative (E′m = -90 mV) than that of photosynthetically grown cells (E′m = +30 mV).
Original language | English (US) |
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Pages (from-to) | 85-93 |
Number of pages | 9 |
Journal | BBA - Bioenergetics |
Volume | 808 |
Issue number | 1 |
DOIs | |
State | Published - Jun 26 1985 |
Keywords
- (C. vinosum)
- Cytochrome
- Electron transport
- Iron-sulfur protein
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- Cell Biology