Fig. 4From: The proangiogenic effects of extracellular vesicles secreted by dental pulp stem cells derived from periodontally compromised teethIdentification and internalization of H-EVs and P-EVs. a Morphology of EVs under transmission electron microscopy (scale bar, 100 nm). b The size and concentration of EVs were identified by nanoparticle analysis. c EV surface markers of ALIX, HSP70, CD9, and CD81 detected by western blot. d Fluorescence microscopy analysis of PKH67-labeled EVs (green) internalized by ECs. Nuclei were stained with DAPI (blue) for counterstaining (scale bar, 50 μm)Back to article page