Figure 2.
Western blotting for cyclooxygenase-2 protein expression after RNA interference treatment of EC109 cells. 1: Parental cells; 2: Negative control siRNA; 3: Cyclooxygenase-2 (COX-2) short interfering RNA (siRNA); 4: Cells treated with aspirin for 48 h after transfection with COX-2 siRNA.