[A model of electron transport in chloroplasts taking into account the Mitchell Q-cycle. Calculation of J(e) and J(H) fluxes in steady state].
On the basis of the earlier proposed model of electron transport, which takes into account the Mitchell Q-cycle, stationary values for the fluxes of electrons Je along the electron transport chain and of protons JH across the thylakoid membrane were obtained, which are calculated now as the functions of photoexcitation of reaction centers and the medium acidity inside and outside of the thylakoid, pHin and pHout. In the framework of the model, the stoichiometric ratio JH/Je is determined virtually only by the time of reduction of plastoquinone (tau B) on the B site of photosystem II and restoration of plastoquinone (tau C) on the C site to the b/f complex.
Dubinskiĭ
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Keldysh Institute of Applied Mathematics, Russian Academy of Sciences, Miusskaya pl. 4, Moscow, 125047 Russia.
D000465:Algorithms; D002736:Chloroplasts / Q000502:physiology*; D004579:Electron Transport; D006863:Hydrogen-Ion Concentration; D008954:Models, Biological; D011522:Protons; D020524:Thylakoids / Q000502:physiology
D011522:Protons
Model' élektronnogo transporta v khloroplastakh, uchityvaiushchaia Q-tsikl Mitchella. Raschet potokov J(e) i J(H) v statsionarnom sostoianii.