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Western blot characterization of exosome preparations by Capturem kits and ultracentrifugation (UC). Western blotting shows that the Capturem kit contains higher levels of exosome-specific markers CD63, CD9, and Alix and lower levels of the non-exosomal protein calnexin and carryover protein albumin. In contrast, the sample prepared using UC contains considerably higher levels of albumin and calnexin. Each lane was loaded with 5¦Ìg of total protein as measured using the pierce BCA protein Assay Kit (Thermo Fisher Scientific).
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