The 6-carboxyfluorescein (FAM)-labeled GreenB1 aptamer (Figure 1A) or FAM-labeled scrambled version of GreenB1 (scrambled GreenB1 [scr-GreenB1]) (Figure 1B) were incubated with two human TNBC cell lines, MDA-MB-231 and MDA-MB-436, and the PR- and ER-positive human breast cancer cell line MCF-7. Here, PGR is linked to breast cancer.