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Old 12-21-2010, 07:50 AM   #1
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Default PubMed: Picoliter DNA sequencing chemistry on an electrowetting-based digital microfl

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

Biotechnol J. 2010 Dec 17;

Authors: Welch ER, Lin YY, Madison A, Fair RB

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.

PMID: 21170981 [PubMed - as supplied by publisher]

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