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PMID: 5257139 Published · ppublish English Journal Article

Energy-linked reactions in photosynthetic bacteria. V. Relation of the light-induced proton uptake to photophosphorylation in R. rubrum chromatophores.

Keister DL, Minton NJ

Abstract

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.

MeSH Terms
Aging Bacterial Chromatophores/metabolism Electron Transport Hydrogen-Ion Concentration Light Models, Chemical Phosphates/metabolism Protons Rhodospirillum/metabolism Time
Chemicals
Phosphates Protons
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Keister D L
Minton N J
References (20)
20 references, click to expand
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Article Info
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abbr.
Proc Natl Acad Sci U S A
ISSN
0027-8424
Published
1969-06-00
Pages
489-95
Language
English
Region
United States
NLM ID
7505876
PMCID
PMC223590
Subset
IM
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