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 language||English (US)|
|Number of pages||7|
|Journal||Biochemical and Biophysical Research Communications|
|State||Published - Jan 31 1972|
All Science Journal Classification (ASJC) codes
- Molecular Biology
- Cell Biology