restriction enzyme

(redirected from Type II site-specific deoxyribonuclease)
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re·stric·tion en·do·nu·cle·ase

one of many endonucleases isolated from bacteria that cleave or hydrolyze (cut) foreign double-stranded DNA chains at specific recognition sites defined by DNA sequences; these endonucleases have become standard laboratory devices for making specific cuts in DNA as a first step in deducing sequences and are sometimes referred to as a "chemical knife," usually named by a three- or four-letter abbreviation of the name of the organism from which isolated (for example, EcoB from Escherichia coli, strain B).
Synonym(s): restriction enzyme
Farlex Partner Medical Dictionary © Farlex 2012

restriction enzyme

n.
Any of a group of enzymes that catalyze the cleavage of DNA at specific sites to produce discrete fragments, used especially in genetic engineering. Also called restriction endonuclease.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

re·stric·tion en·do·nu·cle·ase

(rĕ-strik'shŭn en'dō-nū'klē-ās)
One of many endonucleases isolated from bacteria that hydrolyze (cut) double-stranded DNA chains at specific sequences, thus inactivating a foreign (viral or other) DNA and restricting its activity; standard laboratory devices for making specific cuts in DNA as a first step in deducing sequences.
Synonym(s): restriction enzyme.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

restriction enzyme

One of the many enzymes that break DNA at specific sites. These enzymes are extensively used in research and in GENETIC ENGINEERING. Also known as restriction endonucleases.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

restriction enzyme

or

restriction endonuclease

an endonuclease that recognizes a specific DNA base sequence (recognition sequence, recognition site, restriction sequence or restriction site) and cleaves both strands of DNA at or near that site. The enzyme cuts the DNA, generating restriction fragments with OVERHANGING ENDS or BLUNT ENDS. See also COHESIVE ENDS.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005