Evaluation of individual particle capillary electrophoresis experiments via quantile analysis.

Evaluation of individual particle capillary electrophoresis experiments via quantile analysis.
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通过分位数分析评估单个颗粒毛细管电泳实验。

DOI:
10.1016/j.chroma.2007.04.065
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发表时间:
2007
期刊:
Journal of chromatography. A
影响因子:
--
通讯作者:
Arriaga,EdgarA
Arriaga,EdgarA
中科院分区:
--
文献类型:
--
作者:
Whiting,ChristoferE;Arriaga,EdgarA

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样品中的颗粒数量严重影响对应于单个颗粒测量的分布形状。选择足够数量的粒子,防止由于样本大小的偏差是特别困难的复杂的生物系统中的统计分布是不正常的。分位数分析是一种强大的统计技术,可以快速比较单个粒子的多种分布之间的差异。本报告利用分位数分析表明,检测到的事件数量影响迁移率分布的大鼠肝脏和小鼠肝脏线粒体,样品单个颗粒,通过毛细管电泳与激光诱导荧光分析时。当线粒体样品很小时(例如<78),没有足够的事件来获得统计学相关的迁移率数据。吸附到毛细管表面也显着影响的流动性分布,在少数事件在未涂覆和动态涂覆的毛细管。当毛细管上的线粒体负载足够大时,这些吸附效应可以被克服(即,对于未涂覆的毛细管上的小鼠肝脏和动态涂覆的毛细管上的大鼠肝脏,分别为>609和>1426个事件)。预计分位数分析可用于研究单个颗粒的其他分布,例如纳米颗粒、细胞器和生物分子,并且这些颗粒的分布也将取决于样本大小。
The number of particles in a sample heavily influences the shape of a distribution corresponding to the individual particle measurements. Selecting an adequate number of particles that prevents biases due to sample size is particularly difficult for complex biological systems in which statistical distributions are not normal. Quantile analysis is a powerful statistical technique that can rapidly compare differences between multiple distributions of individual particles. This report utilizes quantile analysis to show that the number of events detected affects the mobility distributions for rat liver and mouse liver mitochondria, sample individual particles, when analyzed via capillary electrophoresis with laser-induced fluorescence. When the mitochondrial sample is small (e.g. <78), there are not enough events to obtain statistically relevant mobility data. Adsorption to the capillary surface also significantly affects the mobility distribution at a small number of events in uncoated and dynamically coated capillaries. These adsorption effects can be overcome when the mitochondrial load on the capillary is sufficiently large (i.e. >609 and >1426 events for mouse liver on uncoated capillaries and rat liver on dynamically coated capillaries, respectively). It is anticipated that quantile analysis can be used to study other distributions of individual particles, such as nanoparticles, organelles, and biomolecules, and that distributions of these particles will also be dependent on sample size.
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