Fig. 3From: A cyclic nano-reactor achieving enhanced photodynamic tumor therapy by reversing multiple resistancesA Cellular uptake of free NR and NR-labeled PTFCG@MH measured by CLSM. B Intracellular fluorescence quantification for different groups. C Flow cytometric analysis of nanoparticles uptake in MDA-MB-231 cells with pre-treatment of various inhibitors. D The quantification of uptake from flow cytometric analysis. **P < 0.01, ***P < 0.001Back to article page