Effect of dibromothymoquinone (DBMIB) on reduction rates of photosystem I donors in intact chloroplasts

Jack Farineau, Hervé Bottin, Gyözö Garab

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Dual effect of dibromothymoquinone (DBMIB), inhibitor and reducing agent at the donor side of Photosystem I, was investigated in isolated intact chloroplasts by flash-induced absorbance changes at 820 and 515 nm. We show that in the absence of other electron donors, rereduction of P700+ by DBMIB proceeds at a very low rate (half-time of ∼10 s) Dual effect of DBMIB explains that the initial rise of electrochromic absorbance change induced by repetitive flashes is usually not diminished while the slow rise is fully inhibited by this compound.

Original languageEnglish
Pages (from-to)721-725
Number of pages5
JournalBiochemical and biophysical research communications
Volume120
Issue number3
DOIs
Publication statusPublished - May 16 1984

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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