Abstract
End-labeling is a rapid and sensitive method for radioactively, or nonisotopically, labeling DNA fragments and is useful for visualizing small amounts of DNA. End-labeling can also be used to label fragments at one end. All of the enzymes employed are specific to either the 3′ or 5′ termini of DNA and will, consequently, only incorporate label once per DNA strand. If double-stranded DNA is used, both ends are labeled, but single end-labeled fragments can be produced by further restriction enzyme digestion. This works well with DNA fragments cloned into polylinkers, as one labeled end can be removed as a tiny DNA fragment, making subsequent purification easier. Such single end-labeled molecules can be used to order restriction enzyme fragments and are a prerequisite for Maxam-Gilbert DNA sequencing (1). End-labeled synthetic oligonucleotides have numerous applications, including sequence specific probes (2), gel retardation and Southwestern assays (3), and sequencing polymerase chain reaction (PCR) products (4).
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References
Pickersky E. (1996) Terminal labelling for Maxam-Gilbert sequencing, in Basic DNA and RNA Protocols (Harwood, A. J., ed.), Methods in Molecular Biology, vol. 58, Humana Totowa, NJ.
Wallace R. B., Shaffer J., Murphy R. F., Bonner J., Hirose T., and Itakura K. (1979) Hybridisation of synthetic oligodeoxyribonucleotides to phi chi 174 DNA: the effect of single base pair mismatch. Nucl. Acid Res. 6, 3543.
Harwood A. J., ed. (1994) Protocols for Gene Analysis, in Methods in Molecular Biology, vol. 31. Humana Totowa, NJ.
Harwood J. C. and Phear G. A. (1996) Direct sequencing of PCR products, in Basic DNA and RNA Protocols, (Harwood, A. J., ed.), Methods in Molecular Biology, vol. 58, Humana Totowa, NJ.
Klenow H., Overgaard-Hansen K., and Patkar S. A. (1971) Proteolytic cleavage of native DNA polymerase into two different catalytic fragments. Eur. J. Biochem. 22, 371–381.
Challberg M. D. and Englund P. T. (1980) Specific labelling of 3′ termini with T4 DNA polymerase. Meth. Enzymol. 65, 39–43.
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© 2002 Humana Press Inc., Totowa, NJ
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Harwood, A.J. (2002). End-Labeling of DNA Probes. In: Theophilus, B.D.M., Rapley, R. (eds) PCR Mutation Detection Protocols. Methods in Molecular Biology, vol 187. Humana Press. https://doi.org/10.1385/1-59259-273-2:017
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DOI: https://doi.org/10.1385/1-59259-273-2:017
Publisher Name: Humana Press
Print ISBN: 978-0-89603-617-8
Online ISBN: 978-1-59259-273-9
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