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Creating Nested DNA Deletions Using Exonuclease III

互联网

508
DNA fragments cloned into plasmids are frequently greater than 500 base pairs in length and thus may be too long to sequence from a single primer-binding site in the vector. An efficient way to sequence such large DNA inserts is to generate a nested set of deletions in the target DNA, effectively moving the priming site closer to the sequence of interest. Similarly, nested deletions can be used to delineate a feature of interest (e.g., a replicon [1 ] or promoter) or to subclone a region of DNA devoid of restriction enzyme sites.
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