CYTOCHROMES OF A BLUE-GREEN ALGA: EXTRACTION OF A C-TYPE WITH  A STRONGLY NEGATIVE REDOX POTENTIAL.
Aqueous extraction of lyophilized Anacystis nidulans cells followed by chromatography on diethylaminoethyl cellulose separates three different c-type cytochromes. Of the two present in highest concentration, cytochrome-554 has a + 0.35-volt redox potential and resembles the cytochrome f of other photosynthetic tissues, while cytochrome-549 has a -0.26-volt potential. The possible participatidn of cytochrome-549 in electron transport in photosynthesis in this alga at a more negative oxidation-reduction potential than previously postulated for any cytochrome is inferred from the similarities in its spectra to the light-induced spectral changes in vivo observed by others.
D002845:Chromatography; D003574:Cytochrome c Group; D003580:Cytochromes; D004579:Electron Transport; D056890:Eukaryota; D008027:Light; D010084:Oxidation-Reduction; D010788:Photosynthesis; D010944:Plants; D012106:Research; D013053:Spectrophotometry
D003574:Cytochrome c Group; D003580:Cytochromes
ALGAE; CHROMATOGRAPHY; CYTOCHROMES; EXPERIMENTAL LAB STUDY; OXIDATION-REDUCTION