Fig. 4. Measurement of the Cy3 counts and Cy5 counts in response to the reaction buffer (control), 0.1 g L^–1 BSA, 0.1 U μL^–1 UDG, 0.1 U μL^–1 TDG, 0.1 U μL^–1 hOGG1, 0.1 U μL^–1 hAAG and 0.1 U μL^–1 hOGG1 + 0.1 U μL^–1 hAAG. The Cy3-labeled molecular beacon (0.3 μM), Cy5-labeled molecular beacon (0.3 μM) and APE1 (0.1 U μL^–1) were used in this research. The error bars represent the standard deviations of the three experiments.