Figure 4From: Altering the selection capabilities of common cloning vectors via restriction enzyme mediated gene disruptionAnalysis of relative vector copy number of pET23a and pET23a: tetA in E. coli co-transformed cells. The blot displays signals for Eco RI linearised vectors from individual transformants carrying the original pET23a vector (lane 1), the pET23a:tetA (lane 2), or vector DNA from co-transformants carrying both pET23a and pET23a:tetA vectors (lane 3).Back to article page