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Characterization of exosomes released by human synovial-derived mesenchymal stem cells (SMSC-Exos). (A) Particle size distribution of SMSC-Exos measured by DLS. (B) Morphology of SMSC-Exos under a transmission electron microscopy. Scale bar: 100nm. (C) Western blotting analysis of exosomal surface markers (including CD9, CD63, CD81, and TSG101). Exosomes from SMSCs of six patients were used. The ultrafiltration liquid of MesenGro hMSC Medium was used as negative control (NC).
