Figure 2.

Binding Assay of the Selected Aptamers

(A) Flow cytometry assays of the binding of FITC-labeled aptamers (M1, M2, M3, M4, and M10) with MDA-MB-231 cells (target cells) and MCF-7 cells (negative cells). (B) Fluorescence imaging of cells using QD605-labeled M3 and QD605-labeled M10. All pictures were taken under a fluorescence microscope with 200× magnification. The ssDNA library was used as negative control. At least three independent experiments were conducted.