Down-regulation of Bcl-XL by RNA interference suppresses cell growth and induces apoptosis in human esophageal cancer cells

Figure 2 Western blotting analysis and effect of siRNA-expressing vectors. L1: Untreated esophageal cancer cells; L2: Esophageal cancer cells were transfected with empty pTZ-U6+1 vector; L3: Esophageal cancer cells were transfected with control siRNA expressing vector; L4: Esophageal cancer cells were transfected with siRNA-expressing vector No.1.