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        Nick Translation

        互联网

        1828
        Nick translation was the first method devised for the in vitro labeling of DNA (1 ). During the reaction the DNA to be labeled is nicked by DNase I yielding a free 3′ hydroxyl end. DNA polymerase I then adds a new nucleotide to this end. The 5′–3′ exonuclease activity of the polymerase then moves the “nick” along the strand in the 3′ direction. The addition of a radioactively labeled nucleotide to the reaction results in probes that can be used in hybridization reactions to DNA immobilized on Southern blots, colony lifts, etc.
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