We have tested all of our tetraspanin (CD9, CD63, & CD81) antibody clones for their ability to stain exosomes purified by size exclusion chromatography (SEC) in flow cytometry. The clones that worked well are listed in a table on the “Exosome & EV Labeling” technology page.
https://biotium.com/technology/exosome-ev-labeling/#antibodies
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