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Cytochrome c M is a new c-class photosynthetic haem protein whose physiological role is still unknown. It has been proposed previously that cytochrome c M can replace cytochrome c 6 and plastocyanin in transferring electrons between the two membrane complexes cytochrome b 6 -f and photosystem I in organisms growing under stress conditions. The experimental evidence...
Electron transfer from P700 in photosystem I (PSI) particles from spinach to Anabaena sp. PCC 7119 flavodoxin has been studied using laser flash absorption spectroscopy. A non-linear protein concentration dependence of the rate constants was obtained, suggesting a two-step mechanism involving complex formation (k=3.6 x 10 7 M -1 . s -1 ) followed by intracomplex electron...
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