Light Dependent Reduction of Pertechnetate (TcO(4)) by Broken Chloroplasts.
Arguments are given for a ferredoxin-mediated reduction of TcO(4) (-), preponderantly into extractable Tc(V) complexes, by illuminated, broken chloroplasts. Photosynthetic O(2)- and NADP-reduction competitively inhibit Tc incorporation. As for O(2), the reaction can be stimulated by the auto-oxidizable electron acceptor methyl viologen. Furthermore TcO(4) (-) can function as terminal acceptor in the diaphorase reaction, with NADPH as electron donor.
Lembrechts
J F
JF
Rijksinstituut voot Volksgezondheid en Milieuhygiëne, c/o Stichting ITAL Keyenbergseweg 6, 6704 PJ Wageningen, The Netherlands.
Desmet
G M
GM