单词	restriction enzyme
释义	restriction enzyme noun : any of various enzymes that cleave DNA into fragments at specific sites in the interior of the molecule called also restriction endonuclease Example Sentences Recent Examples on the Web Some microbes defend themselves from invasion by using molecules known as restriction enzymes. Quanta Magazine, 6 Feb. 2015 In the 1970s, molecular biologists figured out how to use restriction enzymes to cut DNA, giving birth to the modern biotechnology industry. Quanta Magazine, 6 Feb. 2015 Word History First Known Use 1965, in the meaning defined above Medical Definition restriction enzyme noun : any of various enzymes that cleave DNA into fragments at specific sites in the interior of the molecule and are often used as tools in molecular analysis
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