Abstract
The modification of the trapping properties for oxidizing equivalents (holes) within the watersplitting enzyme system Y by chemicals (ADRY agents) has been investigated. It is shown: (1) The ADRY agents decrease significantly the storage life time of the higher trapped hole accumulation states. (2) The acidic NH-or OH-group is a functional indispensable element for substances to be able to act as ADRY agents. (3) The trapping efficiency of the watersplitting enzyme system Y for holes is not correlated with the transmembrane electrochemical gradient. (4) As electron donor for the discharge of the trapped holes acts an andogeneous carrier of the electron transport chain located either between the photosystems I and II respectively or on the reducing side of system I. A special electron donor is not required for the ADRY effect.
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