Control of Photosynthetic Electron Transfer from the Reaction Center to Electron Carriers of Photosystem II Studied by Fluorescence Induction

1981 ◽  
Vol 21 (4) ◽  
pp. 306-315 ◽  
Author(s):  
Shmuel Malkin
Keyword(s):  
Electron Transfer ◽  
Photosystem Ii ◽  
Reaction Center ◽  
Fluorescence Induction ◽  
Electron Carriers ◽  
Photosynthetic Electron Transfer

The Use of O2-Evolving Subchloroplast Particles to Study Acceptor and Inhibitor Sites on the Reducing Side of Photosystem II

1983 ◽  
Vol 38 (9-10) ◽  
pp. 793-798 ◽  
Author(s):  
W. S. Cohen ◽  
J. R. Barton
Keyword(s):  
Electron Transfer ◽  
Electron Transport ◽  
Photosystem Ii ◽  
Differential Sensitivity ◽  
Electron Transfer Chain ◽  
Plastoquinone Pool ◽  
Photosystem Ii Activity ◽  
Transfer Chain ◽  
Photosynthetic Electron Transfer ◽  
Photosystem Ii Particles

Photosystem II particles that retain the ability to evolve O2 have been used to examine acceptor and inhibitor sites in the photosynthetic electron transfer chain between Q and plastoquinone. Employing the water to dichlorobenzoquinone reaction to assay photosystem II activity, we have demonstrated that electron transport in thylakoids and particles is equally sensitive to inhibition by DCMU. dinoseb, metribuzin, HQNO and DBMIB. Based on differential sensitivity to inhibition by DCMU vs. HQNO or DBMIB, we suggest that when synthetic quinones, e.g. 2,6-dichlorobenzoquinone operate as Hill reagents in particles they are reduced primarily by the plastoquinone pool. When synthetic quinones, e.g. 5,6-methylenedioxy-2,3-dimethyl benzoquinone act as autoxidizable acceptors they accept electron from the Q/B complex at a point that is located between the DCMU and HQNO (DBMIB) inhibition sites.

Electron-transfer events near the reaction center in oxygen-evolving photosystem II preparations

Biochemistry ◽  
1988 ◽  
Vol 27 (16) ◽  
pp. 5848-5855 ◽  
Author(s):  
Curtis W. Hoganson ◽  
Gerald T. Babcock
Keyword(s):  
Electron Transfer ◽  
Photosystem Ii ◽  
Reaction Center ◽  
Oxygen Evolving

Mimicking Photosynthetic Electron Transfer

1990 ◽  
Vol 218 ◽  
Author(s):  
Devens Gust ◽  
Thomas A. Moore ◽  
Ana L. Moore
Keyword(s):  
Electron Transfer ◽  
Potential Energy ◽  
Reaction Center ◽  
Chemical Potential ◽  
Reaction Centers ◽  
Photosynthetic Reaction Centers ◽  
Photovoltaic Devices ◽  
Molecular Scale ◽  
Energetic Charge ◽  
Photosynthetic Electron Transfer

AbstractThe photosynthetic reaction centers of plants and bacteria are photovoltaic devices on the molecular scale which convert light energy into chemical potential energy in the form of long-lived, energetic charge separated states. It is now possible to prepare synthetic multicomponent molecules which mimic important aspects of this process. For example, one of the keys to reaction center function is a multistep electron transfer strategy. In this paper, two general types of multistep electron transfer, sequential and parallel, are described and illustrated with several synthetic triad and pentad molecules.

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