Chemical environment heterogeneity around the two chlorophyll a′ molecules in photosystem I

H. Maeda, T. Watanabe, K. Sonoike

Research output: Contribution to journalArticle

4 Citations (Scopus)


Treatment of whole and fractionated plant tissues with hydrophilic and hydrophobic solvent mixtures of varied volume ratio liberates two chlorophyll (Chl) a′ molecules from the photosystem (PS)I core when the solvent hydrophilicity exceeds a critical level, whereas only one molecule is extracted in hydrophobic media. The PSI core proteins, PSI-A and PSI-B, which form a heterodimer, appear to bind one Chl a′ molecule each, in local environments significantly different regarding their hydrophilicity or hydrophobicity.

Original languageEnglish
Pages (from-to)139-143
Number of pages5
JournalJournal of Photochemistry and Photobiology, B: Biology
Issue number2-3
Publication statusPublished - 1993 Oct



  • Chlorophyll a′
  • High performance liquid chromatography (HPLC)
  • Photosystem I
  • Reaction center
  • Spinach
  • Synechococcus

ASJC Scopus subject areas

  • Radiation
  • Radiological and Ultrasound Technology
  • Biophysics
  • Radiology Nuclear Medicine and imaging

Cite this