Binding assay of selected pools to PC-3 and SMMC-7721 cells.

<p>Flow cytometry assay of selected pools binding to target cell line PC-3 (A) and negative control cell line SMMC-7721(B), Blank is the background fluorescence of untreated cells. Lib is FITC-labeled DNA library as negative control. (C) Confocal imaging of PC-3 cells stained by the 15th-round selected pool labeled by FITC (×100 oil immersion lens).