Quantitative studies on the EPR signals of photosynthetic system I and ferredoxin

C. S. Yang, W. E. Blumberg

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The relative sizes of the electron paramagnetic resonance absorptions of ferredoxin and photosynthetic System I were measured at 1.5°K after illuminating spinach chloroplasts at 77°K or at 1.5°K. The total amount of reduced ferredoxin produced by the irradiation was less than 10% of the induced Photosystem I free radical. The EPR signal of a second photosensitive nonheme iron center has also been observed. The reported role of ferredoxin as a primary electron acceptor is discussed.

Original languageEnglish (US)
Pages (from-to)422-428
Number of pages7
JournalBiochemical and Biophysical Research Communications
Volume46
Issue number2
DOIs
StatePublished - Jan 31 1972

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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