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Recognition of early state apoptotic cells. SGC-7901 cells were treated with 250 μM H2O2 for 6 h and stained with 5 µg/mL Au-TPE (A), 5 µg/mL Au-Apt (B), 5 µg/mL Au-Apt-TPE (C) or 5 µg/mL Au-Apt-TPE@Zn (D) with or without NIR irradiation. The fluorescent images were obtained by fluorescence microscope.
