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Dependence of Photophosphorylation by Isolated Chloroplasts on the Oxidation–Reduction State of N-Methylphenazinium Methyl Sulphate (Phenazine Methosulphate)

Nature volume 208, pages 190–191 (1965)Cite this article

Abstract

IT has been previously observed that the rate of photophosphorylation in chromatophores from photosynthetic bacteria was dependent on the oxidation–reduction state of phenazine methosulphate1. On addition of ascorbate which reduces phenazine methosulphate non-enzymatically2, the rate of photophosphorylation was observed to decrease markedly. However, ascorbate has been shown not to have any inhibitory effect on photophosphorylation in isolated chloroplasts catalysed by phenazine methosulphate3. Indeed, ascorbate is commonly used to stimulate photophosphorylation with phenazine methosulphate in isolated chloroplasts3,4.

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Author notes

  1. GUNTER ZWEIG

    Present address: Agricultural Toxicology and Residue Research Laboratory, University of California, Davis, California

  2. GUNTER ZWEIG: Supported by an E. J. deRothschild Memorial Grant during Sabbatical leave from the University of California.

Authors and Affiliations

  1. Biochemistry Section, Weizmann Institute of Science, Rehovoth, Israel

    GUNTER ZWEIG & MORDHAY AVRON

Authors
  1. GUNTER ZWEIG
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  2. MORDHAY AVRON
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ZWEIG, G., AVRON, M. Dependence of Photophosphorylation by Isolated Chloroplasts on the Oxidation–Reduction State of N-Methylphenazinium Methyl Sulphate (Phenazine Methosulphate). Nature 208, 190–191 (1965). https://doi.org/10.1038/208190b0

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