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Characterization of exosomes by transmission electron microscopy (A–C). Exosomes were extracted from culture supernatant of gastric cancer cell lines by ultracentrifugation. Exosomes were recognized as small vesicles 30–100 nm in diameter under transmission electron microscopy. (A) MKN74, (B) MKN74 + EBV, (C) SNU719. Scale bar: 100 nm.
