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Identification of recombination vector pET 32b (+)-UL16 by restriction enzymes digestion. Lane M1, DNA marker; Lane 1, PCR products from pET 32b(+)-UL16; Lane 2, recombination plasmid pET 32b(+)-UL16 was digested with two restriction enzymes HindIII and XhoI; Lane M2, DNA marker.
