Light penetration and photoisomerization in rhodopsin studied by numerical simulations and double-quantum solid-state NMR spectroscopy.

Light penetration and photoisomerization in rhodopsin studied by numerical simulations and double-quantum solid-state NMR spectroscopy.
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通过数值模拟和双量子固态核磁共振波谱研究视紫红质的光穿透和光异构化。

DOI:
10.1021/ja809878c
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发表时间:
2009
影响因子:
15
通讯作者:
Concistrè M
Concistrè M
中科院分区:
化学1区
文献类型:
--
作者:
Concistrè M

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The penetration of light into optically thick samples containing the G-protein-coupled receptor rhodopsin is studied by numerical finite-element simulations and double-quantum solid-state NMR experiments. Illumination with white light leads to the generation of the active bathorhodopsin photostate in the outer layer of the sample but generates a large amount of the side product, isorhodopsin, in the sample interior. The overall yield of bathorhodopsin is improved by using monochromatic 420 nm illumination and by mixing the sample with transparent glass beads. The implications of these findings on the interpretation of previously published rhodopsin NMR data are discussed.
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