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A. Representative TEM photograph of exosomes (scale bar, 200nm). B. Western blot of exosomes and cells for CD63 and β-actin. C. and D. The analysis of RNA from exosomes and cells shows that exosomes are enriched in small RNAs and contain no 18S and 28S ribosomal RNAs, while cells contain 18S and 28S ribosomal RNAs.
