Energy-linked reactions in photosynthetic bacteria. V. Relation of the light-induced proton uptake to photophosphorylation in R. rubrum chromatophores.
The kinetics of photophosphorylation have been studied in Rhodospirillum rubrum chromatophores. No evidence for a time or intensity lag in photophosphorylation was found. An intensity lag could be induced with the uncoupling agent, m-chlorocarbonyl cyanide phenylhydrazone or, in some cases, by aging of the chromatophores. In chloroplasts, the occurrence of a time and intensity lag in phosphorylation has been correlated with the formation of a proton gradient and quoted as evidence that a proton gradient is a prerequisite of phosphorylation. The significance of the absence of a time and intensity lag in chromatophores is discussed in this context.
D000375:Aging; D020130:Bacterial Chromatophores / Q000378:metabolism*; D004579:Electron Transport; D006863:Hydrogen-Ion Concentration; D008027:Light; D008956:Models, Chemical; D010710:Phosphates / Q000378:metabolism*; D011522:Protons; D012246:Rhodospirillum / Q000378:metabolism*; D013995:Time
D010710:Phosphates; D011522:Protons