Obvious fluorescence can be displayed by FITC-FA-BSA-PTX (Figure 10A) under a fluorescence microscope. After three samples are incubated with Hela cells at 37 ℃ for 3 h, FITC-BSA-PTX (Figure 10B) and FITC (Figure 10C) ) The fluorescence is relatively weak, especially for FITC samples, there is no obvious fluorescence.
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