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Isolation and identification of MSC-derived exosomes (MSCs-Exo). (a) The morphology of MSCs-Exo was detected by transmission electron microscope (TEM). (b) The concentration particles of MSCs-Exo were detected by nanoparticle tracking analysis (NTA). (c) The surface marker protein levels of CD63, CD81, and Hsp70 of MSCs-Exo were detected by Western blot assay.
