| 单词 | restriction enzyme | 
| 释义 | > as lemmasrestriction enzyme   restriction enzyme  n. Molecular Biology = restriction endonuclease n. ΚΠ 1965    W. Arber in  Ann. Rev. Microbiol. 19 368  				Assume that a highly specific ‘restriction enzyme’ only initiates the degradation, for example, by cleavage of DNA, and that these cleavage products are then subject to the action of less specific nucleases. 1977    Time 18 Apr. 48/1  				A so-called restriction enzyme, which can sever the DNA of an invading virus, say, at a predetermined point. 2000    Z. Smith White Teeth 		(2001)	 xvi. 417  				Once you know the restriction enzyme for a particular, like, bit of DNA, you can switch anything on or off, like a bloody stereo. < as lemmas | 
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