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PCR-amplified products of the rolB gene in Lactuca serriola. Lanes 1–5 show the absence of the virG gene in the 5 transgenic hairy root lines. Lanes 6–10 show rolB gene fragment amplified in the 5 transgenic hairy root lines. Lane P stands for the plasmid DNA. WT refers to the nontransformed root. Lane M refers to the 100 bp DNA ladder.
