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Exhibit 13D The plasmid pSU922 is a circular DNA containing 25000 base pairs. The β -gal gene codes for the enzyme β -galactosidase, the product of which will turn bacterial colonies blue when grown in the presence of X-gal; the AmpR gene confers ampicillin resistance. Refer to Exhibit 13D. Which restriction site is best for inserting a DNA fragment for analysis?
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