A Microfluidic Mixer for Single-Molecule Kinetics Experiments
A Microfluidic Mixer for Single-Molecule Kinetics Experiments
复制标题
用于单分子动力学实验的微流体混合器
DOI:
10.3866/pku.whxb20110804
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发表时间:
2011
影响因子:
10.9
通讯作者:
中科院分区:
文献类型:
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作者:
We designed and built a microfluidic mixer based on the principle of hydrodynamic focusing governed by Navier-Stokes equation for single-molecule kinetics experiments. The mixer is a cast of poly(dimethylsiloxane) (PDMS) sealed with transparent fused-silica coverglass, which results in low fluorescence background and broad biological compatibility and this enables single-molecule fluorescence detection under nonequilibrium conditions. The pressure regulated sample delivery system is convenient for loading a sample and allows for precise and stable flow velocity control. The combination of microfluidic mixer and single-molecule fluorescence resonance energy transfer (smFRET) allows us to measure the time course of the distribution of the smFRET efficiency in protein folding. We used the fact that denatured protein collapses much faster than the mixing process to characterize the mixing time using donor and acceptor dyes labeled staphylococcal nuclease (SNase) as an smFRET efficiency indicator. By monitoring the smFRET efficiency of denatured SNase during the course of mixing, we determined that the mixing time was 150 ms under conditions suitable for single-molecule detection.
DOI:
10.1201/9781420050288
发表时间:
1999-11
期刊:
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影响因子:
--
作者:
T. Papanastasiou;G. Georgiou;A. Alexandrou
通讯作者:
T. Papanastasiou;G. Georgiou;A. Alexandrou
DOI:
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发表时间:
2006-09
期刊:
--
影响因子:
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作者:
C. Gell;D. Brockwell;Alastair L. Smith
通讯作者:
C. Gell;D. Brockwell;Alastair L. Smith
DOI:
10.1016/b978-0-12-815489-2.00005-8
发表时间:
2019
期刊:
Free-Surface Flow
影响因子:
--
作者:
N. Katopodes
通讯作者:
N. Katopodes