Light Dependent Reduction of Pertechnetate (TcO(4)) by Broken Chloroplasts |
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| Authors: | Lembrechts J F Desmet G M |
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| Institution: | Rijksinstituut voot Volksgezondheid en Milieuhygiëne, c/o Stichting ITAL Keyenbergseweg 6, 6704 PJ Wageningen, The Netherlands;Laboratory of Radiation Research, c/o Stichting ITAL Keyenbergseweg 6, 6704 PJ Wageningen, The Netherlands |
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| Abstract: | Arguments are given for a ferredoxin-mediated reduction of TcO4−, preponderantly into extractable Tc(V) complexes, by illuminated, broken chloroplasts. Photosynthetic O2- and NADP-reduction competitively inhibit Tc incorporation. As for O2, the reaction can be stimulated by the auto-oxidizable electron acceptor methyl viologen. Furthermore TcO4− can function as terminal acceptor in the diaphorase reaction, with NADPH as electron donor. |
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