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- W2047200410 abstract "We present a study aimed at understanding the factors affecting the separation of large DNA molecules by capillary electrophoresis in polymer solutions. In a first series of experiments, a systematic study of the effect of operational parameters on the development of an electrohydrodynamic instability resulting in DNA aggregation and spurious peaks in the electropherograms is presented. The results are discussed in regard to a recent theory of electrohydrodynamic instabilities in macroion suspensions, recently proposed by Isambert et al. Overall, the results provide strong support to the theory. Some situations of interest for applications, and not explicitly considered in the theory, such as asymmetric field pulsing and the use of polymer additives in the buffer, were also considered. Furthermore, robust optimized protocols for high resolution separation of DNA in the range of 100 base pairs to 160 kilobase pairs, are proposed. As predicted by the model, it is shown that using a concentrated isoelectric buffer (histidine) strongly reduces aggregation as compared to the use of a conventional buffer at the same concentration, and allows separation of DNA from 100 bp to 160 kbp in less than 10 min. We also present a systematic study of the dependence of the mobility vs DNA size, pulse frequency, and field strength. The results are discussed with respect to the Biased Reptation with Fluctuations model and a good agreement is obtained. © 1999 John Wiley & Sons, Inc. Biopoly 49: 385–401, 1999" @default.
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- W2047200410 date "1999-04-15" @default.
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- W2047200410 title "Electrohydrodynamically induced aggregation during constant and pulsed field capillary electrophoresis of DNA" @default.
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- W2047200410 doi "https://doi.org/10.1002/(sici)1097-0282(19990415)49:5<385::aid-bip5>3.0.co;2-l" @default.
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