Figure 4From: Effects of the presence of ColE1 plasmid DNA in Escherichia coli on the host cell metabolismPlasmid pOri1 and pOri2 copy number in BL21, with or without the presence of pETrpiA plasmid, uninduced (â– ) or induced (â–¡) wiith IPTG. Plasmid copy number was determined using a real-time PCR method.Back to article page