2003
DOI: 10.1016/s0006-3495(03)74930-3
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Self-Regulation Phenomena Applied to Bacterial Reaction Centers

Abstract: Experimental and theoretical results in support of nonlinear dynamic behavior of photosynthetic reaction centers under light-activated conditions are presented. Different conditions of light adaptation allow for preparation of reaction centers in either of two different conformational states. These states were detected both by short actinic flashes and by the switching of the actinic illumination level between different stationary state values. In the second method, the equilibration kinetics of reaction cente… Show more

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Cited by 33 publications
(47 citation statements)
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“…The rate of electron recombination from the secondary quinone acceptor Q B is written in eq 1 as k r (x) ) k AP e -x . Such a dependence for RCs has been discussed in details previously 1,2,19,20,22 and was based on the fact that the rate constant of electron transfer from Q B to P at normal physiological conditions is given by By assumption that we obtain the assumed expression for k r (x). In the above consideration, we took into account that the slow component of structural rearrangements, triggered by electron localization on Q B causes slow changes in the ∆G AB value due to interaction with the polar surroundings of the secondary electron acceptor in RCs.…”
Section: Methodsmentioning
confidence: 99%
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“…The rate of electron recombination from the secondary quinone acceptor Q B is written in eq 1 as k r (x) ) k AP e -x . Such a dependence for RCs has been discussed in details previously 1,2,19,20,22 and was based on the fact that the rate constant of electron transfer from Q B to P at normal physiological conditions is given by By assumption that we obtain the assumed expression for k r (x). In the above consideration, we took into account that the slow component of structural rearrangements, triggered by electron localization on Q B causes slow changes in the ∆G AB value due to interaction with the polar surroundings of the secondary electron acceptor in RCs.…”
Section: Methodsmentioning
confidence: 99%
“…As we have recently shown, structural memory effects induced by adaptation to a charge-separated state in isolated RCs may be probed in experiments using a sequence of actinic flashes applied to a preilluminated sample. 1,2 The results of similar experiments on membrane-bound RCs are presented in this section. Figure 6a shows the transient transmittance of a sample of membrane-bound RCs with myxothiazol in a 1-cm path length cuvette.…”
Section: Comparison Of the Effective Excitation Intensity Of Membranementioning
confidence: 99%
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