Abstract
Reactivation of 0 2 evolution function has been studied in PS-2 particles after complete removal of Mn and water soluble 10, 17, 24, 33 kDa proteins, It has been shown that 0 2 evolution function in such particles can be reactivated by adding 5 μM Mn 2 and 20 mM Ca 2(+). Preliminary illumination of the sample is necessary to exhibit the reactivation effect of 0 2 evolution. The maximum value of the reactivation of 0 2 evolution rate is about 60% of the control. Upon illumination of the reactivated particles with flashes of 1s duration and at a frequency of 0,1 Hz, 0 2 evolution occurs according to the mechanism analogous to that in the initial parties of PS 2. Thus the reactivation of water oxidation and 0 2 evolution after complete removal of Mn and water soluble 10, 17, 24, 33 kDa proteins resulting in the suppression of 0 2 evolution function has been shown for the first time and it can serve as a basic approach for profound investigation of the mechanism of photosynthetic water oxidation.
Translated title of the contribution | [Reactivation of oxygen accumulation function after complete removal of manganese from the photosystem II particles]. |
---|---|
Original language | Russian |
Pages (from-to) | 61-65 |
Number of pages | 5 |
Journal | Biofizika |
Volume | 33 |
Issue number | 1 |
Publication status | Published - Jan 1988 |