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- W1963526870 abstract "The photoreaction quantum yield of rhodopsin is wavelength dependent: ϕ(λ) is reduced by up to 5% at wavelengths to the red of 500 nm but is invariant (ϕ = 0.65 ± 0.01) between 450 and 500 nm (Kim et al., 2001). To understand this nonstatistical internal conversion process, these results are compared with predictions of a Landau-Zener model for dynamic curve crossing. The initial distribution of excess photon energy in the 28 Franck-Condon active vibrational modes of rhodopsin is defined by a fully thermalized sum-over-states vibronic calculation. This calculation reveals that absorption by high-frequency unreactive modes (e.g., C C stretches) increases as the excitation wavelength is shifted from 570 to 450 nm whereas relatively less energy is deposited into reactive low-frequency modes. This result qualitatively explains the experimentally observed wavelength dependence of ϕ(λ) for rhodopsin and reveals the importance of delocalized, torsional modes in the reactive pathway." @default.
- W1963526870 created "2016-06-24" @default.
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- W1963526870 date "2003-04-01" @default.
- W1963526870 modified "2023-09-27" @default.
- W1963526870 title "Analysis of the Mode-Specific Excited-State Energy Distribution and Wavelength-Dependent Photoreaction Quantum Yield in Rhodopsin" @default.
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- W1963526870 doi "https://doi.org/10.1016/s0006-3495(03)75054-1" @default.
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