Western blot of MUC1 protein and siRNA interference experiments.

<p>(A) Western blots of protein extracts from A549 cells, HepG2 cells, A549 cells treated with control siRNA, and A549 cells treated with MUC1 siRNA, respectively. Actin was also blotted to serve as the control. (B and C) Flow cytometry evaluation of the apatamer's binding to A549 cells treated with MUC1 siRNA (B) or control siRNA (C). The filled histograms represent the control fluorescence signals generated by FITC-labeled random DNA from the library pool.