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Preparation and characterization of P-EVs. (A) Schematic diagram of P-EVs preparation. (B) Transmission electron micrographs of EVs, PMVs and P-EVs. Scale bar = 100 nm. (C) Size distribution of EVs and P-EVs by nanoparticle tracking analysis (n = 3). (D) Surface zeta potential of PMVs, EVs and P-EVs (n = 3). (E) Colloid stability of P-EVs (n = 3). Data are expressed as mean ± SEM.
