Abstract
In-gel hybridization with digoxigenin (DIG)-labeled probes has been shown to detect complementary DNA sequences in dried agarose gels. Gels dried at room temperature or at 55°C in an oven do not show detectable changes in the sensitivity of detection. However, gels dried under vacuum seem to lose the sensitivity by approx 8- to 10-fold. In-gel hybridization after blotting high molecular weight T7 DNA (40 kbp) onto nylon membranes has been demonstrated to transfer the DNA to the membrane inefficiently. In-gel hybridization of DIG-labeled probes with the complementary DNA sequences has been determined to detect as little as 0.05 ng of 40-kbp T7 DNA and single copies of the erythromycin resistance marker gene ermA. Nonradioactive in-gel hybridization provides better quantitation of nucleic acids than filter hybridization in Southern and Northern blot analysis.
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Khan, S.A., Nawaz, M.S. (2007). Direct In-Gel Hybridization of DNA With Digoxigenin-Labeled Probes. In: Hilario, E., Mackay, J. (eds) Protocols for Nucleic Acid Analysis by Nonradioactive Probes. Methods in Molecular Biology, vol 353. Humana Press. https://doi.org/10.1385/1-59745-229-7:93
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DOI: https://doi.org/10.1385/1-59745-229-7:93
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