Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/116575
Title: Restriction endonuclease digestion of DNA.
Authors: Smith, D.R. 
Issue Date: 1993
Citation: Smith, D.R. (1993). Restriction endonuclease digestion of DNA.. Methods in molecular biology (Clifton, N.J.) 18 : 427-431. ScholarBank@NUS Repository.
Abstract: The ability to cleave DNA at specific sites is one of the cornerstones of today's methods of DNA manipulation. Restriction endonucleases are bacterial enzymes that cleave duplex DNA at specific target sequences with the production of defined fragments. These enzymes can be purchased from the many manufacturers of biotechnology products. The nomenclature of enzymes is based on a simple system, proposed by Smith and Nathans. The name of the enzyme (such as Bam HI, Eco RI, and so forth) tells us about the origin of the enzyme, but does not give us any information about the specificity of cleavage. This has to be determined for each individual enzyme. The recognition site for most of the commonly used enzymes is a short palindromic sequence, usually of either 4, 5, or 6 bp in length, such as AGCT (for Alu I), GAATTC (for Eco RI), and so on. Each enzyme cuts the palindrome at a particular site, and two different enzymes may have the same recognition sequence, but cleave the DNA at different points within that sequence. The cleavage sites fall into three different categories, either flush (or blunt) in which the recognition site is cut in the middle, or either with 5'; or 3'; overhangs, in which case unpaired bases will be produced on both ends of the fragment. For a comprehensive review of restriction endonucleases, see Fuchs and Blakesley.
Source Title: Methods in molecular biology (Clifton, N.J.)
URI: http://scholarbank.nus.edu.sg/handle/10635/116575
ISSN: 19406029
Appears in Collections:Staff Publications

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