Abstract
Different lengths of antisense DNA are normally separated by Polyacrylamide gelfilled column using capillary electrophoresis. The rigid gel bed, however, has a limited lifetime due to the forming of air bubbles and clogging particularly when a real sample with complex matrix is analyzed. An alternative is to replace the gel with a replenishable polymer solution. In this work, a capillary electrophoresis system using a microcross (10 nL ) connected with four 75 μm i.d. fused-silica capillaries and operated under high-voltage shunting is described to implement the PEG sieving medium for the separation of antisense DNAs. Both the separation and injection capillaries were filled with polyethylene glycol (PEG) in tris-borate buffer and the separation was performed with pinched-mode. The PEG medium was found to resolve the 15–20mers of antisense DNA under a conventional linear configuration. Substantial band broadening, however, was observed when using the cross configuration under the same separation conditions. A better control of the injection time as well as the applied voltage is required to minimize the sample diffusion.
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S.-H. Chen and R.-T. Tzeng, Anal. Chem. Submitted for publication.
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© 1998 Springer Science+Business Media Dordrecht
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Chen, SH., Lin, YC., Chen, YH., Liao, HS., Wu, CY., Wang, SH. (1998). Electrophoretic Separation of Antisense DNA using Polymer-Solution Filled Capillary by Cross-Injection. In: Harrison, D.J., van den Berg, A. (eds) Micro Total Analysis Systems ’98. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5286-0_37
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DOI: https://doi.org/10.1007/978-94-011-5286-0_37
Publisher Name: Springer, Dordrecht
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