Picoliter DNA sequencing chemistry on an electrowetting-based digital microfluidic platform.

Picoliter DNA sequencing chemistry on an electrowetting-based digital microfluidic platform.
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DOI:
10.1002/biot.201000324
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发表时间:
2011-02
影响因子:
4.7
通讯作者:
Fair, Richard B.
Fair, Richard B.
中科院分区:
工程技术2区
文献类型:
--
作者:
Welch, Erin R. Ferguson;Lin, Yan-You;Madison, Andrew;Fair, Richard B.

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据报道,在PICOLITER规模的数字微流体平台上进行DNA测序化学的研究结果。焦磷酸测序利用核苷酸碱基添加过程中产生的焦磷酸盐来通过使用萤火虫荧光素酶的化学发光反应来启动以检测结尾的过程。可以量化反应过程中产生的光强度,以确定添加到DNA链中的碱数。数字微流体设备的基于逻辑的控制和离散流体液滴非常适合焦磷酸测序过程。磁性的DNA磁性磁性固定在一个位置,并从中添加或分裂以避免产物稀释。在这里,我们讨论用于持有靶DNA的顺磁珠的分配,控制和磁操纵。我们还证明并表征了荧光素酶与三磷酸腺苷的Picoliter-Scale尺度反应,以表示焦磷酸测序的检测步骤以及在此规模上工作的所有必要改变。
The results of investigations into performing DNA sequencing chemistry on a picoliter-scale electrowetting digital microfluidic platform are reported. Pyrosequencing utilizes pyrophosphate produced during nucleotide base addition to initiate a process ending with detection through a chemiluminescence reaction using firefly luciferase. The intensity of light produced during the reaction can be quantified to determine the number of bases added to the DNA strand. The logic-based control and discrete fluid droplets of a digital microfluidic device lend themselves well to the pyrosequencing process. Bead-bound DNA is magnetically held in a single location, and wash or reagent droplets added or split from it to circumvent product dilution. Here we discuss the dispensing, control, and magnetic manipulation of the paramagnetic beads used to hold target DNA. We also demonstrate and characterize the picoliter-scale reaction of luciferase with adenosine triphosphate to represent the detection steps of pyrosequencing and all necessary alterations for working on this scale.
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