Systematic evaluation of fluorescence correlation spectroscopy data analysis on the nanosecond time scale.

Systematic evaluation of fluorescence correlation spectroscopy data analysis on the nanosecond time scale.
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纳秒时间尺度荧光相关光谱数据分析的系统评价

DOI:
10.1039/c3cp50644d
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发表时间:
2013
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
通讯作者:
Bollmann
Bollmann
中科院分区:
--
文献类型:
--
作者:
Steger;Bollmann

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纳秒时间尺度上的荧光时间轨迹中的信号波动可以由报告生物分子动力学的特定猝灭相互作用引起。荧光相关光谱是一种分析工具,用于研究从皮科到毫秒或更长时间尺度上的动态过程。在某些条件下,例如在高粘度的溶剂中,荧光标记的动态生物分子由于旋转和平移扩散、荧光猝灭相互作用和荧光团光物理学而产生多个独立的相关衰减。我们比较了FCS数据的参数估计与多个相关衰减的动态指纹分析和非线性Levenberg-Marquardt拟合过程和确定的条件下,动态指纹分析可以是有利的。在这种情况下,我们在ATTO 655中确定了一个先前未被识别的生物物理过程,该过程在纳秒时间尺度上引入了MR 121中不存在的荧光猝灭。优化的拟合过程被用来解决光诱导电子转移探针的荧光猝灭的粘度依赖性。
Signal fluctuations in a fluorescence time trace on nanosecond time scales can be induced by specific quenching interactions that report on the dynamics of biomolecules. Fluorescence correlation spectroscopy is an analysis tool to investigate dynamic processes on time scales from pico- to milliseconds or longer. Under certain conditions, e.g. in a solvent of high viscosity, a fluorescence labeled dynamic biomolecule yields multiple independent correlation decays due to rotational and translational diffusion, fluorescence quenching interactions, and fluorophore photophysics. We compared parameter estimation for FCS data with multiple correlation decays by dynamical fingerprint analysis and by the non-linear Levenberg–Marquardt fitting procedure and identified conditions for which dynamical fingerprint analysis can be of advantage. In this context we identified a previously unrecognized photophysical process in ATTO655 that introduces fluorescence intermittency on nanosecond time scales that is absent in MR121. The optimized fitting procedure is used to resolve the viscosity dependence of fluorescence quenching for photoinduced electron transfer probes.
多 tau 光子相关数据上的噪声
DOI: --
发表时间: 1991
期刊: Photonics West - Lasers and Applications in Science and Engineering
影响因子: --
作者:
Klaus Schaetzel;R. Peters
通讯作者: R. Peters
DOI: 10.1073/pnas.0500127102
发表时间: 2005-02-15
影响因子: 11.1
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Chattopadhyay, K;Elson, EL;Frieden, C
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DOI: 10.1016/j.chemphys.2011.08.021
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期刊: CHEMICAL PHYSICS
影响因子: 2.3
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通讯作者: Noe, Frank
荧光相关光谱可以告诉我们有关未折叠蛋白质的信息。
DOI: 10.1016/s0065-3233(02)62006-6
发表时间: 2002
影响因子: --
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DOI: 10.1017/s003358350000216x
发表时间: 1976-01-01
影响因子: 6.1
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EHRENBERG, M;RIGLER, R
通讯作者: RIGLER, R