Fig. 3
Biocompatibility and intracellular distribution of PS-MBs. a Cell viability of HUVEC and RAW264.7 cells under different concentration of PS-MBs using CCK-8 assay. b Fluorescence examination of the intracellular distribution of MBs with or without PS-labeled Cou6 at a concentration of 1 × 108/ml (scale bar 30 μm). c Quantitative analysis of fluorescence intensity of internalization MB-labeled Cou6 with or without PS in RAW264.7 cells by Image J. (*P < 0.05 versus control)