4.2.3 Enzymatic stability experiment.
Td was self-assembled with S1, cy5-S2, cy3-S3 and S4. Then the
fluorescence of 0.2 μM Td or LP-Td was measured by F-2500 FL
Spectrophotometer after incubation with 0, 5, 20, 150 U/mL DNase for 15
min. The fluorescence intensity of 560 nm (cy3) and 665 nm (cy5) was
recorded.