| | 1 | Author
| ChunheX. Ua, Yong Zhub, Govindjeeac | Requires cookie* | | | Title
| Differential Inhibition and Rephasing of Photosystem II Electron Acceptor Side by Monohalogenated Acetates of Different Hydrophobicity  | | | | Abstract
| We demonstrate here that monohalogenated acetates (M F A , m onofluoroacetate; M CA, m onochloroacetate; M BA, monobrom oacetate) are unique probes o f the electron acceptor side o f the photosystem II (PS II) reaction center: (1) they differentially inhibit the reoxidation o f the reduced primary plastoquinone electron acceptor, QA~, by the secondary plastoquinone electron acceptor QB, and increase the equilibrium [QA_] in the order: M BA > M C A > M FA; and (2) M CA and M BA rephase the PS II electron acceptor side, a rather unusual effect. This results in flash number dependence o f [QA_] with maxima at even flashes to change to odd flashes. Furthermore, we demonstrate a correlation between the inhibitory activity o f the halo-genated acetates with their hydrophobicity (i.e., partition coefficient). | | | |
Reference
| Z. Naturforsch. 47c, 711—7 (1992); received June 2 1992 | | | |
Published
| 1992 | | | |
Keywords
| M onohalogenated Acetates, Photosystem II, Two Electron Gate, Hydrophobicity, Bicarbonate Effect | | | |
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| default:Reihe_C/47/ZNC-1992-47c-0711.pdf | | | | Identifier
| ZNC-1992-47c-0711 | | | | Volume
| 47 | |
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