Figure 6. Cell-specific internalization of aptamer Wy-5a assessed by flow cytometry assay (left) and confocal imaging (right).

W/O treatment: Cells were incubated with Wy-5a; Pretreatment: cells were pretreated by trypsin and then incubated Wy-5a; aftertreatment: cells were incubated Wy-5a and then treated by trypsin; Lib: negtive control, cells were incubated with FITC-labeled DNA library; blank: is the background fluorescence of untreated cells.