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(a) Fluorescence image in green channel of Hela cells preloaded with Cu2+ (5 mM) for additional 0.5h. (b) Bright-field image of Hela cells preloaded with probe MP (50 μM) in PBS (0.01 M, pH 7.4) for 30 min at 37 °C. (c) The effects of different concentrations of MP on the Hela cells by cck8 method for 24 h.
