Photophosphorylation by swiss-chard chloroplasts.

@article{Avron1960PhotophosphorylationBS,
  title={Photophosphorylation by swiss-chard chloroplasts.},
  author={Mordhay Avron},
  journal={Biochimica et biophysica acta},
  year={1960},
  volume={40},
  pages={
          257-72
        }
}
  • M. Avron
  • Published 1960
  • Chemistry, Medicine
  • Biochimica et biophysica acta
Abstract 1. 1. The preparation of chloroplasts and chloroplast fragments from swiss-chard, which were active in photophosphorylation is described. A chloroplast preparation stable for 24–48 h could be obtained. 2. 2. A sensitive assay for the ATP formed was adopted. It allowed the measurement of very small amounts of ATP formed, and avoided several difficulties encountered in other assays. 3. 3. The requirements in the homogenizing medium and in the reaction mixture were studied. Factors… Expand
Light inactivation of photophosphorylation by swiss-chard chloroplasts.
  • M. Avron
  • Chemistry, Medicine
  • Biochimica et biophysica acta
  • 1960
TLDR
It is suggested that the ligh inactivation observed was the result of a destructive reaction of the normally produced early products in photophosphorylation, as well as the presence of phenazine methosulfate during the light preincubation period largely prevented the inactivation. Expand
Exchange reaction between ATP and labelled pyrophosphate by isolated spinach chloroplasts
TLDR
The present paper shows the possibility of inducing an exchange between ATP and P P without additional energy sources, giving further evidence of the close relationship of PP to X-P. Expand
Photophosphorylation and related properties of reaggregated vesicles from spinach photosystem I particles.
TLDR
In most properties investigated, the reformed membrane vesicles resemble the original chloroplast membrane so far as phenazine methosulfate-mediated cyclic photophosphorylation is concerned, which indicates a high degree of selectivity in the reaggregation process. Expand
Uptake and light activated esterification of 32P by isolated chloroplasts.
TLDR
Ribose 5-phosphate (Rib-5-P) was shown to inhibit P1 esterification without affecting the apparent Km for ADP or P1, and the evidence suggests that Rib- 5-P interferes with the uptake of P 1, and possibly ADP. Expand
[21] Algal preparations with photophosphorylation activity
TLDR
Photophosphorylation rates with particles from Anacystis as reported by the Trebst group are comparable to those from spinach as far as the cyclic system with N -methylphenazinium methyl sulfate (PMS) and ferredoxin is concerned. Expand
THE EFFECTS OF STRUCTURAL DEGRADATION ON THE COUPLED PHOTOCHEMICAL ACTIVITIES OF ISOLATED CHLOROPLASTS.
TLDR
The hypothesis that, as with mitochondria, a more complex phospholipoprotein structure is necessary for the coupled reactions than for electron transport alone is supported. Expand
A coupling factor for photosynthetic phosphorylation from plastids of light- and dark-grown maize.
TLDR
It is shown that NaCl-EDTA extracts of etioplasts can restore photosynthetic phosphorylation activity to depleted green membranes of chloroplasts and the significance of these observations is discussed with regard to membrane formation in general and plastid membrane development in particular. Expand
Etude de la photophosphorylation endogene des chloroplastes isoles d'epinard
Abstract Whole spinach chloroplasts were able to perform photophosphorylation under nitrogen without the addition of any redox cofactor. This “endogenous” phosphorylation was totally insensitive toExpand
Cyanobacterial and chloroplast F1-ATPases: cross-reconstitution of photophosphorylation and subunit immunological relationships
TLDR
The ability of cyanobacterial and chloroplast enzymes to restore activity to heterologous membranes in the absence of immunological similarities between their respective δ and e subunits may suggest that structural features other than particular amino acid sequences of these subunits are paramount in their roles in binding F 1 to the membrane and in sealing proton leaks. Expand
Photophosphorylation in stable chloroplast fragments from the alga Chlamydomonas reinhardi
Abstract Stable chloroplast fragments exhibiting high reproducible rates of photophosphorylation and good coupling ratios can be obtained from the alga Chlamydomonas reinhardi using a simpleExpand
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Evidence is presented in support of the conclusion that the synthesis of ATP by green cells occurs at two distinct sites: anaerobically in chloroplasts, by photosynthetic phosphorylation, and aerobic in smaller cytoplasmic particles, presumably mitochondria, by oxidative phosphorylated independent of light. Expand
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  • Chemistry, Medicine
  • Plant physiology
  • 1949
TLDR
Evidence that a copper enzyme, polyphenoloxidase (otherwise known as tyrosinase or catecholase), is localized in the chloroplasts of spinach beet (chard), Beta vu?garis is presented. Expand
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TLDR
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