Electron donors to P700 in cyanobacteria and algae: An instance of unusual genetic variability

摘要: Cytochrome c-553 and/or plastocyanin have been isolated from many cyanobacteria and several eukaryotic algae. The isoelectric point for both the cytochrome varies that of a basic protein (pI 9.3) in filamentous to an acidic 3.8) unicellular eukaryotes. given genus may show isomeric forms distinguishable either net charge or nonpolar character. Some variation between cytochromes different genera is localized one region primary structure.