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On extracting the O 2 -evolving Photosystem II (PS II) particles with CaCl 2 solution, three proteins of 33, 24 and 16 kDa were completely liberated from the particles concomitant with total inactivation of O 2 evolution, but most of the Mn atoms present in the initial particles were preserved unaffected being still associated with the particles. On reading the extracted proteins...
Divalent salt-washing of O 2 -evolving PS II particles caused total liberation of 33-, 24- and 16-kDa proteins, but the resulting PS II particles retained almost all amounts of Mn present in initial particles. The retained Mn was EPR-silent when the particles were kept in high concentrations of divalent salt. By divalent salt-washing, the activity of diphenylcarbazide (DPC) photooxidation...
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