Single-base extension: Difference between revisions
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'''Single Base Extension''' (SBE) is a method for determining the identity of a [[nucleotide]] base at a specific position along a [[nucleic acid]]. The method is used to identify a [[single nucleotide polymorphism]] (SNP). |
'''Single Base Extension''' (SBE) is a method for determining the identity of a [[nucleotide]] base at a specific position along a [[nucleic acid]]. The method is used to identify a [[single nucleotide polymorphism]] (SNP). |
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Revision as of 02:29, 10 April 2008
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Single Base Extension (SBE) is a method for determining the identity of a nucleotide base at a specific position along a nucleic acid. The method is used to identify a single nucleotide polymorphism (SNP).
In the method, invented by Phillip Goelet, Michael Knapp and Stephen Anderson while at Molecular Tool, an oligonucleotide primer hybridizes to a complementary region along the nucleic acid, to form a duplex, with the primer’s terminal 3’ end directly adjacent to the nucleotide base to be identified. The oligonucleotide primer is enzymatically extended a single base by a nucleotide terminator complementary to the nucleotide being identified. The terminator prevents additional nucleotides from being incorporated.
Many different approaches can be taken for determining the identity of a terminator, including fluorescence labeling, mass labeling for mass spectrometry, measuring enzyme activity using a protein moiety, and isotope labeling.
See also
References
Philip Goelet, Michael R. Knapp, Stephen Anderson, (1999), U.S. Patent No 5,888,819. Washington, DC: U.S. Patent and Trademark Office.
