Figure 2. Td uptake by E. coli. a) Flow cytometry and b)
confocal microscopy imaging to analyze the uptake efficiency of Td byE. coli. The bacterial cells were incubated with different
concentrations of FAM-labeled Td (0.1, 0.5, or 1 μM) for 1.5 h and then
were either treated or not treated with DNase before flow cytometry and
confocal microscopy analyses. SS: single-strand DNA; Td: DNA
tetrahedron. SS was used as a control. Scale bars represent 10 μm.