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Bindings of Apt-HJ and AS1411 to CT26 (A) or CHO cells (B). Each Apt-HJ complex or each free AS1411 aptamer was labeled with one FAM. The cells were incubated with FAM-labeled random DNA (black lines), Apt-HJ (red lines), or free AS1411 (blue lines), washed and analyzed by flow cytometry. Cells stained by FAM-labeled random DNA were used as the control.
